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| Soundex | Last Name | First Name | Pages | Resource |
|---|---|---|---|---|
| O220 | Oakes | 53 | MCGS Newsletter, Vol. XIX (1998), No. 1-4 | |
| O165 | Obermeyer | 58 | MCGS Newsletter, Vol. XIX (1998), No. 1-4 | |
| O425 | Olson | 58 | MCGS Newsletter, Vol. XIX (1998), No. 1-4 | |
| O216 | Osborne | 48 | MCGS Newsletter, Vol. XIX (1998), No. 1-4 | |
| O500 | Owen | 24-29,46-51,58,64-68 | MCGS Newsletter, Vol. XIX (1998), No. 1-4 | |
| O130 | Offut | Carl E. | 128 | Clugston Funeral Home Records 1926-1949, Volume I |
| O431 | Oldfield | Guy Allen | 122 | Clugston Funeral Home Records 1926-1949, Volume I |
| O416 | Oliver | Kenneth Harold | 6 | Clugston Funeral Home Records 1926-1949, Volume I |
| O425 | Olson | Alma L. | 42 | Clugston Funeral Home Records 1926-1949, Volume I |
| O425 | Olson | Laura L. | 37 | Clugston Funeral Home Records 1926-1949, Volume I |
| O425 | Olson | Martin | 6 | Clugston Funeral Home Records 1926-1949, Volume I |
| O216 | Osborn | Brice Willey | 126 | Clugston Funeral Home Records 1926-1949, Volume I |
| O216 | Osborn | Henry Clay Dean | 43 | Clugston Funeral Home Records 1926-1949, Volume I |
| O236 | Ostermann | Henry K. | 131 | Clugston Funeral Home Records 1926-1949, Volume I |
| O255 | Oakman | 6 | 1850 Federal Census | |
| O340 | Odell | 105 | 1850 Federal Census | |
| O354 | Odenweller | 82 | 1850 Federal Census | |
| O216 | Osberry | 113 | 1850 Federal Census | |
| O216 | Osborne | 37, 151, 164, 165, 166, 180 | 1850 Federal Census | |
| O256 | Osmer | 6 | 1850 Federal Census | |
| O230 | Ostey | 55 | 1850 Federal Census | |
| O234 | Ostley | 59 | 1850 Federal Census | |
| O163 | Overten | 85 | 1850 Federal Census | |
| O163 | Overton | 37 | 1850 Federal Census | |
| O500 | Owen | 86, 149, 150 | 1850 Federal Census | |
| O240 | Owsley | 55, 59 | 1850 Federal Census | |
| O165 | O Brian | 299 | 1870 Federal Census | |
| O165 | O Brien | 296, 439 | 1870 Federal Census | |
| O256 | O Connor | 250 | 1870 Federal Census | |
| O354 | O Donnell | 209 | 1870 Federal Census | |
| O560 | O Marre | 481 | 1870 Federal Census | |
| O560 | O Mearrow | 271 | 1870 Federal Census | |
| O540 | O Neal | 24, 27, 37, 169 | 1870 Federal Census | |
| O255 | Oakman | 166, 179, 454 | 1870 Federal Census | |
| O200 | Oaks | 157 | 1870 Federal Census | |
| O145 | Oblander | 75, 76, 77 | 1870 Federal Census | |
| O340 | Odell | 84, 401 | 1870 Federal Census | |
| O350 | Odem | 412 | 1870 Federal Census | |
| O354 | Odenweller | 411 | 1870 Federal Census | |
| O320 | Odes | 439 | 1870 Federal Census | |
| O350 | Odine | 86, 87 | 1870 Federal Census | |
| O163 | Offord | 472 | 1870 Federal Census | |
| O242 | Oglesby | 94, 324 | 1870 Federal Census | |
| O600 | Ohara | 97 | 1870 Federal Census | |
| O650 | Ohern | 139 | 1870 Federal Census | |
| O435 | Olden | 450, 467 | 1870 Federal Census | |
| O432 | Oldknow | 254 | 1870 Federal Census | |
| O400 | Oley | 391 | 1870 Federal Census | |
| O416 | Oliver | 65, 71, 372 | 1870 Federal Census | |
| O132 | Opitz | 378, 379, 380, 387 | 1870 Federal Census | |
| O100 | Opp | 349 | 1870 Federal Census | |
| O155 | Oppenheim | 256 | 1870 Federal Census | |
| O652 | Orens | 362 | 1870 Federal Census | |
| O600 | Orr | 248 | 1870 Federal Census | |
| O216 | Osborn | 16, 69, 192, 221 | 1870 Federal Census | |
| O216 | Osborne | 418 | 1870 Federal Census | |
| O216 | Osboron | 193 | 1870 Federal Census | |
| O216 | Osburn | 155 | 1870 Federal Census | |
| O300 | Ott | 121 | 1870 Federal Census | |
| O200 | Ough | 432, 466 | 1870 Federal Census | |
| O500 | Owen | 63, 139, 440, 446, 450, 451 | 1870 Federal Census | |
| O520 | Owens | 93, 139, 240 | 1870 Federal Census | |
| O222 | Oakman | 51, 52 | Bardolph Cemetery | |
| O200 | Oaks | 29, 30, 55, 56, 172 | Bardolph Cemetery | |
| O354 | Odenwalt | 119 | Bardolph Cemetery | |
| O354 | O'Donnel | 116 | Bardolph Cemetery | |
| O340 | O'Dowell | 116 | Bardolph Cemetery | |
| O235 | Ogden | 16, 29, 44, 71, 106 | Bardolph Cemetery | |
| O540 | O'Neal | 68 | Bardolph Cemetery | |
| O540 | O'Neil | 17 | Bardolph Cemetery | |
| O600 | Orr | 2, 12, ,15, 22, 23, 47, 75, 81, 82, 122, 129, 132, 165 | Bardolph Cemetery | |
| O216 | Osborn | 181 | Bardolph Cemetery | |
| O365 | Otterman | 40 | Bardolph Cemetery | |
| O164 | Overholser | 17 | Bardolph Cemetery | |
| O162 | Overstreet | 8, 163 | Bardolph Cemetery | |
| O540 | O Neil | 29 | 1880 Federal Census | |
| O640 | O Riley | 348 | 1880 Federal Census | |
| O220 | Oakes | 277, 286, 301 | 1880 Federal Census | |
| O255 | Oakman | 41, 216, 217, 222, 480 | 1880 Federal Census | |
| O200 | Oaks | 174, 222, 395, 406 | 1880 Federal Census | |
| O165 | Obermayer | 435 | 1880 Federal Census | |
| O145 | Oblander | 60, 76 | 1880 Federal Census | |
| O165 | O'Brien | 93, 94, 346 | 1880 Federal Census | |
| O340 | Odell | 58, 312, 455 | 1880 Federal Census | |
| O354 | Odenweller | 249, 252, 305, 461 | 1880 Federal Census | |
| O100 | Off | 459 | 1880 Federal Census | |
| O163 | Offord | 369 | 1880 Federal Census | |
| O242 | Ogelsby | 376 | 1880 Federal Census | |
| O240 | Ogle | 94 | 1880 Federal Census | |
| O650 | O'Haran | 77 | 1880 Federal Census | |
| O600 | O'Harr | 177, 178 | 1880 Federal Census | |
| O435 | Oldham | 157 | 1880 Federal Census | |
| O432 | Oldknow | 307, 312, 346 | 1880 Federal Census | |
| O425 | Olson | 48 | 1880 Federal Census | |
| O400 | Olway | 421 | 1880 Federal Census | |
| O560 | Omera | 326 | 1880 Federal Census | |
| O540 | Oneal | 334 | 1880 Federal Census | |
| O132 | Opitz | 419 | 1880 Federal Census | |
| O100 | Opp | 400 | 1880 Federal Census | |
| O650 | Oram | 432, 433 | 1880 Federal Census | |
| O640 | Oreal | 296 | 1880 Federal Census | |
| O650 | Orm | 200 | 1880 Federal Census | |
| O600 | Orr | 294, 298 | 1880 Federal Census | |
| O216 | Osborn | 8, 13, 14, 15, 18, 105, 226, 247, 286, 364, 366, 416, 432 | 1880 Federal Census | |
| O216 | Osborne | 8, 13, 14, 15, 18, 105, 226, 247, 286, 364, 366, 416, 432 | 1880 Federal Census | |
| O216 | Osburn | 299, 468 | 1880 Federal Census | |
| O300 | Ott | 147 | 1880 Federal Census | |
| O350 | Otton | 218 | 1880 Federal Census | |
| O200 | Ough | 479 | 1880 Federal Census | |
| O164 | Overly | 185 | 1880 Federal Census | |
| O165 | Overmiller | 45 | 1880 Federal Census | |
| O162 | Overstreet | 346, 404 | 1880 Federal Census | |
| O500 | Owen | 139, 485, 487, 490 | 1880 Federal Census | |
| O520 | Owens | 125, 463 | 1880 Federal Census | |
| O130 | Obet | 472 | 1860 Federal Census | |
| O165 | O'Bryant | 557, 795 | 1860 Federal Census | |
| O256 | O'Conner | 556 | 1860 Federal Census | |
| O354 | Odenweller | 794 | 1860 Federal Census | |
| O235 | Ogden | 484 | 1860 Federal Census | |
| O240 | Ogle | 463 | 1860 Federal Census | |
| O241 | Ogleby | 490 | 1860 Federal Census | |
| O425 | Oleson | 508 | 1860 Federal Census | |
| O560 | Omera | 536 | 1860 Federal Census | |
| O540 | Oniel | 620 | 1860 Federal Census | |
| O640 | O'Riley | 560 | 1860 Federal Census | |
| O630 | Ort | 744 | 1860 Federal Census | |
| O620 | Orwick | 432 | 1860 Federal Census | |
| O620 | Orwig | 413 | 1860 Federal Census | |
| O216 | Osburn | 407, 580, 664, 694, 822, 825 | 1860 Federal Census | |
| O216 | Osbury | 362 | 1860 Federal Census | |
| O256 | Osmer | 572 | 1860 Federal Census | |
| O200 | Ough | 675 | 1860 Federal Census | |
| O163 | Overhottzer | 807 | 1860 Federal Census | |
| O163 | Overton | 567, 769, 787 | 1860 Federal Census | |
| O500 | Owen | 612, 700, 701, 763 | 1860 Federal Census | |
| O520 | Owens | 478 | 1860 Federal Census | |
| O640 | O??Riley | 13, 37 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O255 | Oakman | 7, 8, 12, 36, 37 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O152 | Obenshain | 52 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O165 | Obermeyer | 33, 46, 47, 48, 50 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O354 | Odenweiler | 12, 36 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O235 | Ogden | 12, 36, 37 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O242 | Oglesby | 7 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O265 | Ogren | 9 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O432 | Oldknow | 12, 37 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O426 | Olker | 36 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O216 | Osborne | 52 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O500 | Owen | 12, 13, 15, 16, 17, 23, 24, 25, 26, 27, 29, 36, 37 | MCGS Newsletter, Vol. XX (1999), No. 1-4 | |
| O152 | Obenchain | 6 | Industry Cemetery | |
| O354 | Odenweller | 79, 80, 271 | Industry Cemetery | |
| O252 | Okins | 241 | Industry Cemetery | |
| O416 | Oliver | 245, 247, 259 | Industry Cemetery | |
| O425 | Olson | 176, 181, 216, 217, 242 | Industry Cemetery | |
| O540 | O'Neil | 194 | Industry Cemetery | |
| O655 | Orman | 29, 57 | Industry Cemetery | |
| O600 | Orr | 212, 219, 220, 239 | Industry Cemetery | |
| O216 | Osborn | 8, 62, 63, 80, 108, 116, 143, 150, 264 | Industry Cemetery | |
| O236 | Oster | 221, 231, 266 | Industry Cemetery | |
| O500 | Owen | 59, 112, 268 | Industry Cemetery | |
| O520 | Owens | 141, 168, 169, 173 | Industry Cemetery | |
| O255 | Oakman | 5,10,20 | Grandma Flack's Scrapbook - Vol 3 | |
| O152 | Obenshane | 28 | Grandma Flack's Scrapbook - Vol 3 | |
| O343 | Odewalt | 24 | Grandma Flack's Scrapbook - Vol 3 | |
| O235 | Ogden | 39 | Grandma Flack's Scrapbook - Vol 3 | |
| O200 | Ogg | 54 | Grandma Flack's Scrapbook - Vol 3 | |
| O600 | O'harra | 118,128 | Grandma Flack's Scrapbook - Vol 3 | |
| O425 | Olson | 74,83,96 | Grandma Flack's Scrapbook - Vol 3 | |
| O652 | Oranger | 54 | Grandma Flack's Scrapbook - Vol 3 | |
| O650 | Oron | 84 | Grandma Flack's Scrapbook - Vol 3 | |
| O600 | Orr | 72,85,94,128 | Grandma Flack's Scrapbook - Vol 3 | |
| O500 | Owen | 98 | Grandma Flack's Scrapbook - Vol 3 | |
| O520 | Owens | 5,86 | Grandma Flack's Scrapbook - Vol 3 | |
| O255 | Oakman | 3, 10, 12, 13, 14, 16, 18, 25, 30, 31, 36, 37, 40, 93 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O200 | Oaks | 11, 38 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O152 | Obenshain | 8 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O354 | Odenweller | 124 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O354 | O'Donnell | 9, 76 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O163 | Offerd | 62 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O235 | Ogden | 10, 28, 45, 66, 73, 88, 98, 104, 105, 106, 119 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O240 | Ogle | 33 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O600 | O'Hara | 47 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O432 | Oldknow | 42, 54 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O425 | Olson | 91 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O100 | Opp | 48, 58, 76, 111, 130 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O600 | Orr | 32, 54, 88, 106 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O216 | Osborn | 29, 30, 62, 80 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O216 | Osborne | 29, 30, 62, 80 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O234 | Osdoll | 94 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O365 | Otterman | 9, 107 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O552 | Owning | 32 | Abstracts of Bardolph News, Sep 1893-Sep 1912 | |
| O540 | O'Neal | 223 | IL State Geneal Soc Qrtrly 31:4 (Winter 1999) | |
| O520 | Owens | 223 | IL State Geneal Soc Qrtrly 31:4 (Winter 1999) | |
| O540 | O'Neal | 2 | 1830 Federal Census | |
| O216 | Osborn | 1 | 1830 Federal Census | |
| O240 | Owsly | 3 | 1830 Federal Census | |
| O216 | Osborn | 4,5 | Pennington Cemetery (not Penn.Pt.) | |
| O255 | Oakman | 80 | Churches of McDonough County, IL | |
| O152 | Obenschain | 225 | Churches of McDonough County, IL | |
| O152 | Obenshain | 97,98 | Churches of McDonough County, IL | |
| O151 | Obenveller | 203 | Churches of McDonough County, IL | |
| O242 | O'Callghan | 36 | Churches of McDonough County, IL | |
| O256 | O'Connor | 147,148 | Churches of McDonough County, IL | |
| O340 | Odell | 45 | Churches of McDonough County, IL | |
| O133 | Oftedahl | 129 | Churches of McDonough County, IL | |
| O600 | O'Hara | 130 | Churches of McDonough County, IL | |
| O435 | Oldham | 4 | Churches of McDonough County, IL | |
| O410 | Olive | 196 | Churches of McDonough County, IL | |
| O416 | Oliver | 108,152 | Churches of McDonough County, IL | |
| O560 | Omer | 8,56 | Churches of McDonough County, IL | |
| O540 | O'Neill | 130 | Churches of McDonough County, IL | |
| O550 | Onion | 100 | Churches of McDonough County, IL | |
| O652 | Oranger | 18 | Churches of McDonough County, IL | |
| O216 | Osborn | 95,112 | Churches of McDonough County, IL | |
| O216 | Osborne | 18 | Churches of McDonough County, IL | |
| O236 | Osterhouse | Churches of McDonough County, IL | ||
| O240 | Ousley | 23 | Churches of McDonough County, IL | |
| O163 | Overton | 86,187 | Churches of McDonough County, IL | |
| O500 | Owen | 15,49,72 | Churches of McDonough County, IL | |
| O240 | Owsley | 143 | Churches of McDonough County, IL | |
| O630 | Orahood | 31,37,38 | Rural Cemeteries - Vol 16 | |
| O600 | Orr | 33 | Rural Cemeteries - Vol 16 | |
| O161 | Overbay | 37 | Rural Cemeteries - Vol 16 | |
| O216 | Osburn | 8 | Rural Cemeteries - Vol 9 | |
| O255 | Oakman | 18 | Rural Cemeteries - Vol 11 | |
| O354 | Odenweller | 9 | Rural Cemeteries - Vol 11 | |
| O435 | Oldham | vi | Rural Cemeteries - Vol 11 | |
| O216 | Osborn | 18 | Rural Cemeteries - Vol 11 | |
| O235 | Ogden | 6 | Rural Cemeteries - Vol 17 | |
| O540 | O'neil | 15 | Rural Cemeteries - Vol 17 | |
| O240 | Ousley | 8 | Rural Cemeteries - Vol 17 | |
| O500 | Owen | 8 | Rural Cemeteries - Vol 17 | |
| O240 | Owsley | 6,8 | Rural Cemeteries - Vol 17 | |
| O425 | Olson | 89,94 | IL State Geneal Soc Qrtrly 22:2 (Summer 1990) | |
| O100 | Opp | 89 | IL State Geneal Soc Qrtrly 22:2 (Summer 1990) | |
| O600 | Orr | 90 | IL State Geneal Soc Qrtrly 22:2 (Summer 1990) | |
| O520 | Owens | 91 | IL State Geneal Soc Qrtrly 22:2 (Summer 1990) | |
| O220 | Oakes | CH-20 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O255 | Oakman | 2-74, 4-80 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O354 | Odenweller | CC-11, CC-7, 1-64 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O240 | Ogle | Jan-42 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O540 | O'Neal | CH-21 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O540 | O'Neil | Feb-33 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O216 | Osborn | 2-52, 2-4, 3-6, 1-106, 2-68 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O216 | Osborne | Feb-51 | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O500 | Owen | 17-Jan | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O520 | Owens | 14-Mar | Scotland Township Cemeteries (Camp Creek, Craig, County Home) | |
| O255 | Oakman | 68,69 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O152 | Obenshane | 50 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O340 | Odell | 53 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O650 | Ohern | 40 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O216 | Osborne | 68 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O200 | Ough | 66 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O520 | Owens | 53,67,68,69 | MCGS Newsletter, Vol. XXI (2000), No. 1-4 | |
| O152 | Obenshain | 22,24,100 | Grandma Flack's Scrapbook - Vol 1 | |
| O354 | Odenweller | 26 | Grandma Flack's Scrapbook - Vol 1 | |
| O325 | Oetken | 22 | Grandma Flack's Scrapbook - Vol 1 | |
| O416 | Olliver | 107 | Grandma Flack's Scrapbook - Vol 1 | |
| O540 | O'neil | 52 | Grandma Flack's Scrapbook - Vol 1 | |
| O655 | Orman | 86 | Grandma Flack's Scrapbook - Vol 1 | |
| O600 | Orr | 95,97 | Grandma Flack's Scrapbook - Vol 1 | |
| O635 | Ortman | 53 | Grandma Flack's Scrapbook - Vol 1 | |
| O216 | Osborn | 35,83 | Grandma Flack's Scrapbook - Vol 1 | |
| O216 | Osborne | 21,96,97 | Grandma Flack's Scrapbook - Vol 1 | |
| O500 | Owen | 17,27,84,85,104 | Grandma Flack's Scrapbook - Vol 1 | |
| O240 | Oakley | 62 | Grandma Flack's Scrapbook - Vol 4 | |
| O255 | Oakman | 61,63 | Grandma Flack's Scrapbook - Vol 4 | |
| O152 | Obenshein | 52 | Grandma Flack's Scrapbook - Vol 4 | |
| O354 | O'donnell | 72 | Grandma Flack's Scrapbook - Vol 4 | |
| O525 | Ohnsman | 13,30 | Grandma Flack's Scrapbook - Vol 4 | |
| O550 | Onion | 36 | Grandma Flack's Scrapbook - Vol 4 | |
| O525 | Onken | 127 | Grandma Flack's Scrapbook - Vol 4 | |
| O100 | Opp | 130 | Grandma Flack's Scrapbook - Vol 4 | |
| O655 | Orman | 78 | Grandma Flack's Scrapbook - Vol 4 | |
| O600 | Orr | 59,89,119,122,126,129 | Grandma Flack's Scrapbook - Vol 4 | |
| O216 | Osborn | 23,32 | Grandma Flack's Scrapbook - Vol 4 | |
| O216 | Osborne | 65,71,122,128 | Grandma Flack's Scrapbook - Vol 4 | |
| O520 | Owens | 118 | Grandma Flack's Scrapbook - Vol 4 | |
| O540 | ONeal | Samuel | 7 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O216 | Osborn | William | 2 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O216 | Osborn | Kisiah | 2 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O230 | Osgood | E. S. | 3 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O230 | Osgood | Ann | 3 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O230 | Osgood | Abigail | 3 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O365 | Otterman | Melissa | 24 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O163 | Overton | C. T. | 23 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O500 | Owen | Asal | 8 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O520 | Owens | Waskin | 7 | Abstracts of McDonough Co. Wills, Book 1, 1834-1857 |
| O220 | Oakes | Illinois Marriage Index | ||
| O216 | Oakford | Illinois Marriage Index | ||
| O255 | Oakman | Illinois Marriage Index | ||
| O200 | Oaks | Illinois Marriage Index | ||
| O152 | Obenshain | Illinois Marriage Index | ||
| O145 | Oblander | Illinois Marriage Index | ||
| O165 | Obrine | Illinois Marriage Index | ||
| O254 | Oconnell | Illinois Marriage Index | ||
| O256 | Oconner | Illinois Marriage Index | ||
| O340 | Odell | Illinois Marriage Index | ||
| O354 | Odenweller | Illinois Marriage Index | ||
| O354 | Odonnell | Illinois Marriage Index | ||
| O634 | Oertel | Illinois Marriage Index | ||
| O163 | Offord | Illinois Marriage Index | ||
| O216 | Ogborn | Illinois Marriage Index | ||
| O235 | Ogden | Illinois Marriage Index | ||
| O240 | Ogle | Illinois Marriage Index | ||
| O242 | Oglesbee | Illinois Marriage Index | ||
| O242 | Oglesby | Illinois Marriage Index | ||
| O600 | Ohara | Illinois Marriage Index | ||
| O650 | Oheirn | Illinois Marriage Index | ||
| O436 | Older | Illinois Marriage Index | ||
| O431 | Oldfield | Illinois Marriage Index | ||
| O435 | Oldham | Illinois Marriage Index | ||
| O432 | Oldknow | Illinois Marriage Index | ||
| O426 | Olger | Illinois Marriage Index | ||
| O416 | Oliver | Illinois Marriage Index | ||
| O425 | Olsen | Illinois Marriage Index | ||
| O425 | Olson | Illinois Marriage Index | ||
| O563 | Ommert | Illinois Marriage Index | ||
| O540 | Oneal | Illinois Marriage Index | ||
| O540 | Oneil | Illinois Marriage Index | ||
| O540 | Oneill | Illinois Marriage Index | ||
| O100 | Opie | Illinois Marriage Index | ||
| O132 | Opits | Illinois Marriage Index | ||
| O132 | Opitz | Illinois Marriage Index | ||
| O100 | Opp | Illinois Marriage Index | ||
| O155 | Oppenheim | Illinois Marriage Index | ||
| O630 | Orahood | Illinois Marriage Index | ||
| O652 | Oringdale | Illinois Marriage Index | ||
| O650 | Orme | Illinois Marriage Index | ||
| O600 | Orr | Illinois Marriage Index | ||
| O632 | Ortegren | Illinois Marriage Index | ||
| O634 | Ortell | Illinois Marriage Index | ||
| O635 | Orteman | Illinois Marriage Index | ||
| O635 | Ortman | Illinois Marriage Index | ||
| O650 | Orum | Illinois Marriage Index | ||
| O620 | Orwig | Illinois Marriage Index | ||
| O216 | Osbern | Illinois Marriage Index | ||
| O216 | Osborn | Illinois Marriage Index | ||
| O216 | Osborne | Illinois Marriage Index | ||
| O216 | Osbourn | Illinois Marriage Index | ||
| O216 | Osburn | Illinois Marriage Index | ||
| O216 | Osbury | Illinois Marriage Index | ||
| O236 | Ostrander | Illinois Marriage Index | ||
| O236 | Ostrem | Illinois Marriage Index | ||
| O300 | Ott | Illinois Marriage Index | ||
| O300 | Ottie | Illinois Marriage Index | ||
| O200 | Ough | Illinois Marriage Index | ||
| O240 | Ousley | Illinois Marriage Index | ||
| O340 | Outlaw | Illinois Marriage Index | ||
| O340 | Outley | Illinois Marriage Index | ||
| O161 | Overbay | Illinois Marriage Index | ||
| O163 | Overdorff | Illinois Marriage Index | ||
| O165 | Overman | Illinois Marriage Index | ||
| O162 | Overstreet | Illinois Marriage Index | ||
| O163 | Overton | Illinois Marriage Index | ||
| O500 | Owen | Illinois Marriage Index | ||
| O520 | Owens | Illinois Marriage Index | ||
| O240 | Owsley | Illinois Marriage Index | ||
| O152 | Obenchain | 33 | Grandma Flack's Scrapbook - Vol 2 | |
| O152 | Obenshain | 12,17 | Grandma Flack's Scrapbook - Vol 2 | |
| O162 | Obershain | 9 | Grandma Flack's Scrapbook - Vol 2 | |
| O354 | Odenweller | 83 | Grandma Flack's Scrapbook - Vol 2 | |
| O241 | Ogilvee | 86 | Grandma Flack's Scrapbook - Vol 2 | |
| O650 | O'hern | 110 | Grandma Flack's Scrapbook - Vol 2 | |
| O525 | Ohnsman | 9 | Grandma Flack's Scrapbook - Vol 2 | |
| O425 | Olson | 86 | Grandma Flack's Scrapbook - Vol 2 | |
| O652 | Ormsby | 44 | Grandma Flack's Scrapbook - Vol 2 | |
| O662 | O'rourke | 90 | Grandma Flack's Scrapbook - Vol 2 | |
| O600 | Orr | 104 | Grandma Flack's Scrapbook - Vol 2 | |
| O216 | Osborn | 105 | Grandma Flack's Scrapbook - Vol 2 | |
| O216 | Osborne | 18,29 | Grandma Flack's Scrapbook - Vol 2 | |
| O500 | Owen | 49 | Grandma Flack's Scrapbook - Vol 2 | |
| O520 | Owens | 9,77 | Grandma Flack's Scrapbook - Vol 2 | |
| O165 | O'bryan | IL Civil War Rosters | ||
| O250 | O'cain | IL Civil War Rosters | ||
| O340 | Odell | IL Civil War Rosters | ||
| O634 | Oertel | IL Civil War Rosters | ||
| O242 | Oglesbee | IL Civil War Rosters | ||
| O242 | Oglesby | IL Civil War Rosters | ||
| O540 | O'neil | IL Civil War Rosters | ||
| O600 | Orr | IL Civil War Rosters | ||
| O216 | Osborn | IL Civil War Rosters | ||
| O165 | Overman | IL Civil War Rosters | ||
| O162 | Overstreet | IL Civil War Rosters | ||
| O163 | Overton | IL Civil War Rosters | ||
| O500 | Owen | IL Civil War Rosters | ||
| O520 | Owens | IL Civil War Rosters | ||
| O163 | Obredavick | 12 | Grandma Flack's Scrapbook - Vol 5 | |
| O360 | O'dear | 91 | Grandma Flack's Scrapbook - Vol 5 | |
| O354 | Odenweller | 2,32,51,85 | Grandma Flack's Scrapbook - Vol 5 | |
| O354 | O'donnell | 111 | Grandma Flack's Scrapbook - Vol 5 | |
| O600 | O'hara | 107 | Grandma Flack's Scrapbook - Vol 5 | |
| O600 | O'harra | 26 | Grandma Flack's Scrapbook - Vol 5 | |
| O432 | Oldknow | 2,51 | Grandma Flack's Scrapbook - Vol 5 | |
| O425 | Olson | 72,75,78,92,94 | Grandma Flack's Scrapbook - Vol 5 | |
| O540 | O'neil | 10 | Grandma Flack's Scrapbook - Vol 5 | |
| O540 | O'neill | 42,108 | Grandma Flack's Scrapbook - Vol 5 | |
| O600 | Orr | 40,42,50,114 | Grandma Flack's Scrapbook - Vol 5 | |
| O216 | Osborn | 6,19,87 | Grandma Flack's Scrapbook - Vol 5 | |
| O216 | Osborne | 20,75,91,131 | Grandma Flack's Scrapbook - Vol 5 | |
| O164 | Overholser | 100 | Grandma Flack's Scrapbook - Vol 5 | |
| O550 | Oweman | 41 | Grandma Flack's Scrapbook - Vol 5 | |
| O520 | Owens | 56,79,92 | Grandma Flack's Scrapbook - Vol 5 | |
| O520 | Owings | 41 | Grandma Flack's Scrapbook - Vol 5 | |
| O152 | Obenshain | 75 | Grandma Flack's Scrapbook - Vol 6 | |
| O125 | Obeschain | 120 | Grandma Flack's Scrapbook - Vol 6 | |
| O240 | Ogle | 77 | Grandma Flack's Scrapbook - Vol 6 | |
| O600 | O'hara | 1 | Grandma Flack's Scrapbook - Vol 6 | |
| O600 | O'harra | 113,122 | Grandma Flack's Scrapbook - Vol 6 | |
| O432 | Olds | 44,117 | Grandma Flack's Scrapbook - Vol 6 | |
| O425 | Oleson | 77,82 | Grandma Flack's Scrapbook - Vol 6 | |
| O416 | Oliver | 94,107 | Grandma Flack's Scrapbook - Vol 6 | |
| O425 | Olson | 94,96,110 | Grandma Flack's Scrapbook - Vol 6 | |
| O100 | Opp | 85,94 | Grandma Flack's Scrapbook - Vol 6 | |
| O655 | Orman | 42 | Grandma Flack's Scrapbook - Vol 6 | |
| O600 | Orr | 85 | Grandma Flack's Scrapbook - Vol 6 | |
| O216 | Osborn | 11,42,98,100 | Grandma Flack's Scrapbook - Vol 6 | |
| O236 | Oster | 51 | Grandma Flack's Scrapbook - Vol 6 | |
| O520 | Owens | 48,59,113,118,127 | Grandma Flack's Scrapbook - Vol 6 | |
| O220 | Oakes | 30 | Grandma Flack's Scrapbook - Vol 7 | |
| O255 | Oakman | 20 | Grandma Flack's Scrapbook - Vol 7 | |
| O165 | O'brien | 67 | Grandma Flack's Scrapbook - Vol 7 | |
| O240 | Ogle | 32 | Grandma Flack's Scrapbook - Vol 7 | |
| O242 | Oglesby | 35 | Grandma Flack's Scrapbook - Vol 7 | |
| O600 | O'hara | 80 | Grandma Flack's Scrapbook - Vol 7 | |
| O600 | O'harra | 32,47,122,127,129 | Grandma Flack's Scrapbook - Vol 7 | |
| O650 | O'hern | 78 | Grandma Flack's Scrapbook - Vol 7 | |
| O525 | Ohnsman | 55 | Grandma Flack's Scrapbook - Vol 7 | |
| O431 | Oldfield | 26,58 | Grandma Flack's Scrapbook - Vol 7 | |
| O452 | Olinger | 65 | Grandma Flack's Scrapbook - Vol 7 | |
| O416 | Oliver | 18,62,70 | Grandma Flack's Scrapbook - Vol 7 | |
| O452 | Ollinger | 68 | Grandma Flack's Scrapbook - Vol 7 | |
| O425 | Olsen | 72 | Grandma Flack's Scrapbook - Vol 7 | |
| O425 | Olson | 54,56,70,93,97 | Grandma Flack's Scrapbook - Vol 7 | |
| O540 | O'neal | 88 | Grandma Flack's Scrapbook - Vol 7 | |
| O540 | O'neil | 71 | Grandma Flack's Scrapbook - Vol 7 | |
| O550 | Onion | 70 | Grandma Flack's Scrapbook - Vol 7 | |
| O100 | Opp | 43 | Grandma Flack's Scrapbook - Vol 7 | |
| O600 | Orr | 6,29 | Grandma Flack's Scrapbook - Vol 7 | |
| O216 | Osborn | 24,25,31,78,80 | Grandma Flack's Scrapbook - Vol 7 | |
| O216 | Osborne | 25,80,125 | Grandma Flack's Scrapbook - Vol 7 | |
| O236 | Oster | 18,83,119 | Grandma Flack's Scrapbook - Vol 7 | |
| O520 | Owens | 5,122,129 | Grandma Flack's Scrapbook - Vol 7 | |
| O520 | Owings | 31,90,116 | Grandma Flack's Scrapbook - Vol 7 | |
| O255 | Oakman | 109 | Grandma Flack's Scrapbook - Vol 8 | |
| O600 | O'Harra | 19,110 | Grandma Flack's Scrapbook - Vol 8 | |
| O525 | Ohnsman | 13,92 | Grandma Flack's Scrapbook - Vol 8 | |
| O460 | O'Leary | 78 | Grandma Flack's Scrapbook - Vol 8 | |
| O416 | Oliver | 33 | Grandma Flack's Scrapbook - Vol 8 | |
| O425 | Olson | 40 | Grandma Flack's Scrapbook - Vol 8 | |
| O560 | Omer | 18 | Grandma Flack's Scrapbook - Vol 8 | |
| O652 | Ormsby | 68 | Grandma Flack's Scrapbook - Vol 8 | |
| O600 | Orr | 18,20,36 | Grandma Flack's Scrapbook - Vol 8 | |
| O640 | Orrill | 49 | Grandma Flack's Scrapbook - Vol 8 | |
| O632 | Ortgessen | 52 | Grandma Flack's Scrapbook - Vol 8 | |
| O216 | Osborn | 19,41,77,93 | Grandma Flack's Scrapbook - Vol 8 | |
| O236 | Oster | 47,53,109 | Grandma Flack's Scrapbook - Vol 8 | |
| O325 | Ottoson | 60 | Grandma Flack's Scrapbook - Vol 8 | |
| O500 | Owen | 11,13,103 | Grandma Flack's Scrapbook - Vol 8 | |
| O520 | Owens | 77 | Grandma Flack's Scrapbook - Vol 8 | |
| O520 | Owings | 92 | Grandma Flack's Scrapbook - Vol 8 | |
| O355 | Oatman | 22 | 1840 Federal Census | |
| O520 | Oens | 5, 23 | 1840 Federal Census | |
| O000 | O-i | 13 | 1840 Federal Census | |
| O216 | Osburn | 16 | 1840 Federal Census | |
| O216 | Osbury | 16 | 1840 Federal Census | |
| O163 | Overton | 10 | 1840 Federal Census | |
| O163 | Ovrtan | 12 | 1840 Federal Census | |
| O600 | O 'hara | 68 | History & Reminiscences of Alex Holmes (Macomb) | |
| O256 | Osmer | 18, 49 | History & Reminiscences of Alex Holmes (Macomb) | |
| O255 | Oakman | 43,72 | Multum in Parvo - History of Colchester | |
| O500 | Owen | 40 | Multum in Parvo - History of Colchester | |
| O216 | Osborn | x,14,16 | Rural Cemeteries - Vol 1 | |
| O340 | Outlaw | 21 | Rural Cemeteries - Vol 1 | |
| O255 | Oakman | 10 | Rural Cemeteries - Vol 12 | |
| O220 | Oakes | 10,17 | Rural Cemeteries - Vol 13 | |
| O255 | Oakman | 10,34 | Rural Cemeteries - Vol 13 | |
| O540 | O'neil | 29 | Rural Cemeteries - Vol 13 | |
| O216 | Osborne | 10 | Rural Cemeteries - Vol 13 | |
| O500 | Owen | 3 | Rural Cemeteries - Vol 13 | |
| O340 | O'dell | 9 | Rural Cemeteries - Vol 2 | |
| O216 | Osborn | 20,26 | Rural Cemeteries - Vol 2 | |
| O520 | Owens | 39 | Rural Cemeteries - Vol 2 | |
| O255 | Oakman | 35 | Rural Cemeteries - Vol 3 | |
| O216 | Osborn | 12 | Rural Cemeteries - Vol 3 | |
| O216 | Osbron | 27 | Rural Cemeteries - Vol 3 | |
| O520 | Owens | 29 | Rural Cemeteries - Vol 3 | |
| O500 | Owen | 5,9,11,12,13,30,31,33,34,35 | Rural Cemeteries - Vol 4 | |
| O432 | Oldknow | 18 | Rural Cemeteries - Vol 8 | |
| O600 | Orr | 18 | Rural Cemeteries - Vol 8 | |
| O220 | Oakes | 34 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O255 | Oakman | 34 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O200 | Oaks | 6 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O235 | Ogden | 3, 5 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O600 | Orr | 27 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O620 | Orwig | 14 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O216 | Osborn | 20 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O500 | Owen | 8 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O520 | Owens | 18, 23, 29 | 1900 Federal Census of Macomb Township (includes Bardolph but NOT Macomb City) |
|
| O216 | Osborn | 26 | Rural Cemeteries - Vol 5 | |
| O255 | Oakman | 20 | Rural Cemeteries - Vol 6 | |
| O256 | Oconnor | 38 | Rural Cemeteries - Vol 6 | |
| O354 | Odenweller | vii,51,52 | Rural Cemeteries - Vol 6 | |
| O216 | Osborn | 21,37,45 | Rural Cemeteries - Vol 6 | |
| O216 | Osborne | 34 | Rural Cemeteries - Vol 6 | |
| O200 | Oaks | a10,a11,17 | Rural Cemeteries - Vol 7 | |
| O431 | Oldfield | a11,17 | Rural Cemeteries - Vol 7 | |
| O432 | Oldknow | a11,17 | Rural Cemeteries - Vol 7 | |
| O600 | Orr | a11,17,48 | Rural Cemeteries - Vol 7 | |
| O540 | O'neill | 7 | Rural Cemeteries - Vol 14 | |
| O216 | Osborn | 36 | Rural Cemeteries - Vol 14 | |
| O240 | Owsley | 11 | Rural Cemeteries - Vol 14 | |
| O355 | Oatman | 43 | Rural Cemeteries - Vol 15 | |
| O216 | Osborn | 52 | Rural Cemeteries - Vol 15 | |
| O163 | Overton | 12 | Rural Cemeteries - Vol 15 | |
| O165 | Obrien | 23 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O345 | Odeland | 23 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O354 | Odenweller | 16 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O242 | Oglesbee | 36 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O550 | Onion | 35 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O630 | Orahood | 38 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O620 | Orwig | 25 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O216 | Osborn | 5, 22, 30 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O216 | Osburn | 23 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O340 | Outlaw | 5 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O163 | Overton | 16 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O500 | Owen | 5, 22 | 1859 Tax Lists for 93 School Districts in McDonough Co. | |
| O255 | Oakman | 5,6,24,30 | 1900 Federal Census Blandinsville Township | |
| O265 | Ogreen | 6 | 1900 Federal Census Blandinsville Township | |
| O416 | Oliver | 37 | 1900 Federal Census Blandinsville Township | |
| O425 | Olson | 1,9 | 1900 Federal Census Blandinsville Township | |
| O163 | Overton | 7 | 1900 Federal Census Emmet Township | |
| O255 | Oakman | 56 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O310 | Odbby | 57 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O340 | Odell | 71 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O426 | Olker | 12 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O640 | O'reiley | 71 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O216 | Osborn | 32 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O216 | Osborne | 6 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O500 | Owen | 57 | MCGS Newsletter, Vol. XXII (2001), No. 1-4 | |
| O255 | Oakman | 50 | Mt Auburn Cemetery, Colchester | |
| O162 | Oberg | 50,110 | Mt Auburn Cemetery, Colchester | |
| O242 | Oglesby | 110 | Mt Auburn Cemetery, Colchester | |
| O435 | Oldham | 50 | Mt Auburn Cemetery, Colchester | |
| O425 | Olson | 50,110 | Mt Auburn Cemetery, Colchester | |
| O540 | Oneil | 50,110 | Mt Auburn Cemetery, Colchester | |
| O216 | Osborn | 50,110 | Mt Auburn Cemetery, Colchester | |
| O300 | Ott | 50,110 | Mt Auburn Cemetery, Colchester | |
| O300 | Otte | 50,110 | Mt Auburn Cemetery, Colchester | |
| O161 | Overbay | 50 | Mt Auburn Cemetery, Colchester | |
| O255 | Oakman | Anna Margaret | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Bertha B | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Blanche D | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Carl Alexander | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Carl H | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Dora | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Emmaline | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Jennie Brinkerhoff | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | John S | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Joseph Henry | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Mabel A | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Mary E | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Mary L | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Robert Lee | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Sharon (Sharee) | 52 | Glade City Cemetery - Blandinsville |
| O255 | Oakman | Mary L | A4 | Glade City Cemetery - Blandinsville |
| O165 | Oberman | Rita Lynn | 52 | Glade City Cemetery - Blandinsville |
| O340 | Odell | Scott | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Anna I | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Bertha M | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Ester | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Miss Ethel Marie | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Harmon A | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Harold W | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Luther John | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Martin | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Vickie Lynn | 52 | Glade City Cemetery - Blandinsville |
| O265 | Ogren | Naomi May | A4 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Alida | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Andrew | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Betty May | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Carl Dewayne | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Emma Bratt | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Florence May Bice | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Lillian May | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Mable Louella | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Minnie Victoria | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Oliver | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Oscar T | 52 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Virgil V | 53 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Wendel | 53 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Wendell W | 53 | Glade City Cemetery - Blandinsville |
| O425 | Olson | Carl A | A4 | Glade City Cemetery - Blandinsville |
| O320 | Otis | John W | 53 | Glade City Cemetery - Blandinsville |
| O650 | Oram | Iby Cook | 38 | Old Macomb Cemetery |
| O500 | Owen | Charity Ann | 31 | Old Macomb Cemetery |
| O500 | Owen | Nathaniel | 31 | Old Macomb Cemetery |
| O640 | O=riley | Ellen | 1a | 1860 Mortality Schedule |
| O235 | Ogden | Clarence | 1 | 1860 Mortality Schedule |
| O416 | Oliver | Carrie | 3 | 1870 Mortality Schedule |
| O650 | Orrem | Cynthia | 7 | 1870 Mortality Schedule |
| O165 | Obermayer | 3 | 1880 Mortality Schedule | |
| O354 | Odenweller | Ray | 2 | 1880 Mortality Schedule |
| O532 | Onitz | Charles | 4 | 1880 Mortality Schedule |
| O500 | Owen | Roswell | 1 | 1880 Mortality Schedule |
| O255 | Oakman | 107 | St Paul's Catholic Cemetery, Macomb | |
| O235 | Oastman | 5 | St Paul's Catholic Cemetery, Macomb | |
| O165 | Obrien | 13,14,34,35,116,126 | St Paul's Catholic Cemetery, Macomb | |
| O256 | Oconner | 38 | St Paul's Catholic Cemetery, Macomb | |
| O260 | Ogarra | 115 | St Paul's Catholic Cemetery, Macomb | |
| O600 | Ohara | 126,150 | St Paul's Catholic Cemetery, Macomb | |
| O600 | Oharra | 75,127 | St Paul's Catholic Cemetery, Macomb | |
| O426 | Olker | 127,141 | St Paul's Catholic Cemetery, Macomb | |
| O425 | Olsen | 183 | St Paul's Catholic Cemetery, Macomb | |
| O540 | Oneil | 2,3,4,127,190 | St Paul's Catholic Cemetery, Macomb | |
| O540 | Oneill | see ONeil | St Paul's Catholic Cemetery, Macomb | |
| O640 | Oriley | 127,128 | St Paul's Catholic Cemetery, Macomb | |
| O620 | Orwig | 85 | St Paul's Catholic Cemetery, Macomb | |
| O216 | Osburn | 128 | St Paul's Catholic Cemetery, Macomb | |
| O520 | Owens | 57,70,134 | St Paul's Catholic Cemetery, Macomb | |
| O255 | Oakman | Alice (Rigg) | 5:120 | Corda Taylor Obituary Albums |
| O355 | Oatman | Dallas | 5:120 | Corda Taylor Obituary Albums |
| O355 | Oatman | Maria Elizabeth (Butcher) | 5:117 | Corda Taylor Obituary Albums |
| O145 | Oblander | Anna L. (Bartells) | 5:117 | Corda Taylor Obituary Albums |
| O145 | Oblander | Charles E. | 5:126 | Corda Taylor Obituary Albums |
| O145 | Oblander | John Frederick Gustave | 5:124 | Corda Taylor Obituary Albums |
| O145 | Oblander | William | 5:124 | Corda Taylor Obituary Albums |
| O220 | Ochs | Charles Adam | 5:129 | Corda Taylor Obituary Albums |
| O350 | Oden | James C. | 5:120 | Corda Taylor Obituary Albums |
| O354 | Odonnell | Thomas Gene | 5:122 | Corda Taylor Obituary Albums |
| O163 | Offord | Oscar A. | 5:134 | Corda Taylor Obituary Albums |
| O235 | Ogden | Harry K. | 5:118 | Corda Taylor Obituary Albums |
| O240 | Ogle | Charles | 5:117 | Corda Taylor Obituary Albums |
| O240 | Ogle | Mrs. Charles (Watson) | 5:121 | Corda Taylor Obituary Albums |
| O240 | Ogle | Robert Lee | 5:118 | Corda Taylor Obituary Albums |
| O242 | Oglesby | Richard | 5:121 | Corda Taylor Obituary Albums |
| O650 | Oherron | Henry | 5:118 | Corda Taylor Obituary Albums |
| O416 | Oliver | Alice Luella (Lutz) | 5:118 | Corda Taylor Obituary Albums |
| O416 | Oliver | James Henry | 5:116 | Corda Taylor Obituary Albums |
| O416 | Oliver | Joseph R. | 5:118 | Corda Taylor Obituary Albums |
| O425 | Olson | Dr. John Edgar | 5:129 | Corda Taylor Obituary Albums |
| O540 | Omalley | John | 5:136 | Corda Taylor Obituary Albums |
| O540 | Omalley | Neva (Smith) | 5:136 | Corda Taylor Obituary Albums |
| O100 | Opp | Austin | 5:119 | Corda Taylor Obituary Albums |
| O100 | Opp | Dorothea (Fugate) | 5:132 | Corda Taylor Obituary Albums |
| O100 | Opp | Lela (McGhee) | 5:119 | Corda Taylor Obituary Albums |
| O100 | Opp | Thomas Everitt | 5:132 | Corda Taylor Obituary Albums |
| O100 | Opp | Veta Elizabeth (Marshall) | 5:114 | Corda Taylor Obituary Albums |
| O600 | Orr | Euphemia Agnes (Hood) | 5:127,132 | Corda Taylor Obituary Albums |
| O600 | Orr | John | 5:122 | Corda Taylor Obituary Albums |
| O600 | Orr | Margaret J. | 5:133 | Corda Taylor Obituary Albums |
| O600 | Orr | Ollie M. (Lindsay) | 5:115 | Corda Taylor Obituary Albums |
| O600 | Orr | Robert W. | 5:133 | Corda Taylor Obituary Albums |
| O600 | Orr | W. Kay | 5:122 | Corda Taylor Obituary Albums |
| O600 | Orr | Wilbert Victor | 5:115 | Corda Taylor Obituary Albums |
| O650 | Orum | Alice A. (Cadwalader) | 5:131 | Corda Taylor Obituary Albums |
| O620 | Orwig | Charles F. | 5:128 | Corda Taylor Obituary Albums |
| O620 | Orwig | Charles S. | 5:134 | Corda Taylor Obituary Albums |
| O620 | Orwig | Clarence Lewis | 5:128,134 | Corda Taylor Obituary Albums |
| O620 | Orwig | Eva May (Merrill) | 5:128 | Corda Taylor Obituary Albums |
| O620 | Orwig | Flora (Ray) | 5:129 | Corda Taylor Obituary Albums |
| O620 | Orwig | Frances Elizabeth (Helle) | 5:127 | Corda Taylor Obituary Albums |
| O620 | Orwig | Henry F. | 5:128 | Corda Taylor Obituary Albums |
| O620 | Orwig | James | 5:134 | Corda Taylor Obituary Albums |
| O620 | Orwig | James Lewis | 5:127 | Corda Taylor Obituary Albums |
| O620 | Orwig | John T. | 5:128 | Corda Taylor Obituary Albums |
| O620 | Orwig | Mary Elizabeth (Strode) | 5:134 | Corda Taylor Obituary Albums |
| O620 | Orwig | Mary Louise (Westfall) | 5:129 | Corda Taylor Obituary Albums |
| O620 | Orwig | Roy | 5:128,134 | Corda Taylor Obituary Albums |
| O620 | Orwig | Sidner L. | 5:119 | Corda Taylor Obituary Albums |
| O216 | Osborn | Clarence | 5:129 | Corda Taylor Obituary Albums |
| O216 | Osborne | Edward | 5:116 | Corda Taylor Obituary Albums |
| O216 | Osburn | Daniel William | 5:123 | Corda Taylor Obituary Albums |
| O216 | Osburn | Effie (Huddleson) | 5:125 | Corda Taylor Obituary Albums |
| O216 | Osburn | Harry C. | 5:125 | Corda Taylor Obituary Albums |
| O216 | Osburn | Leania (Dimmitt) | 5:123 | Corda Taylor Obituary Albums |
| O216 | Osburn | Willard | 5:123 | Corda Taylor Obituary Albums |
| O161 | Overbaugh | Gale H. | 5:118 | Corda Taylor Obituary Albums |
| O162 | Overcash | Homer | 5:136 | Corda Taylor Obituary Albums |
| O163 | Overton | Laura (Heckard) | 5:129 | Corda Taylor Obituary Albums |
| O200 | Oaks | 16 | 1900 Federal Census Eldorado Township | |
| O256 | Oconnor | 19 | 1900 Federal Census Eldorado Township | |
| O650 | Ohern | 12 | 1900 Federal Census Eldorado Township | |
| O650 | Oherron | 25, 26 | 1900 Federal Census Eldorado Township | |
| O425 | Olson | 22 | 1900 Federal Census Eldorado Township | |
| O260 | Oscar | 10 | 1900 Federal Census Eldorado Township | |
| O255 | Oakman | 27 | 1900 Federal Census Hire Township | |
| O500 | Owen | 21 | 1900 Federal Census Hire Township | |
| O163 | Offord | 18 | 1900 Federal Census New Salem Township | |
| O431 | Oldfield | 10 | 1900 Federal Census New Salem Township | |
| O100 | Opp | 4 | 1900 Federal Census New Salem Township | |
| O130 | Oviatt | 8 | 1900 Federal Census New Salem Township | |
| O255 | Oakman | ANNA | Illinois Statewide Death Index | |
| O255 | Oakman | CARL H | Illinois Statewide Death Index | |
| O255 | Oakman | DARLIS PAULINE | Illinois Statewide Death Index | |
| O255 | Oakman | EMALINE | Illinois Statewide Death Index | |
| O255 | Oakman | G DIMPLE & | Illinois Statewide Death Index | |
| O255 | Oakman | ISAAC NEWTON | Illinois Statewide Death Index | |
| O255 | Oakman | J ELIZABETH | Illinois Statewide Death Index | |
| O255 | Oakman | JOHN STEELE | Illinois Statewide Death Index | |
| O255 | Oakman | JOSEPH HENRY | Illinois Statewide Death Index | |
| O255 | Oakman | JOSEPH H | Illinois Statewide Death Index | |
| O255 | Oakman | MARY E | Illinois Statewide Death Index | |
| O255 | Oakman | WILLIAM HERBERT | Illinois Statewide Death Index | |
| O330 | Oathout | CHARLES H | Illinois Statewide Death Index | |
| O355 | Oatman | GEORGE DECATUR | Illinois Statewide Death Index | |
| O355 | Oatman | MARIAH ELIZABETH | Illinois Statewide Death Index | |
| O152 | Obenshain | CALEB | Illinois Statewide Death Index | |
| O165 | Oberman | RITA LYNN | Illinois Statewide Death Index | |
| O145 | Oblander | ANNA L | Illinois Statewide Death Index | |
| O145 | Oblander | ELIZABETH | Illinois Statewide Death Index | |
| O145 | Oblander | JOHN FREDRICK | Illinois Statewide Death Index | |
| O145 | Oblander | JOHN V | Illinois Statewide Death Index | |
| O145 | Oblander | SALLIE C | Illinois Statewide Death Index | |
| O340 | Odell | SCOTT | Illinois Statewide Death Index | |
| O350 | Oden | JAMES CANARY | Illinois Statewide Death Index | |
| O354 | Odenweller | JOSEPHINE | Illinois Statewide Death Index | |
| O354 | Odenweller | SIMON P | Illinois Statewide Death Index | |
| O354 | Odonnell | MARY E | Illinois Statewide Death Index | |
| O235 | Ogden | ELIZA P | Illinois Statewide Death Index | |
| O235 | Ogden | HARRY K | Illinois Statewide Death Index | |
| O235 | Ogden | ISABELLE | Illinois Statewide Death Index | |
| O242 | Ogelsby | SYDIA | Illinois Statewide Death Index | |
| O240 | Ogle | CHARLES | Illinois Statewide Death Index | |
| O240 | Ogle | EUPHAMIA I | Illinois Statewide Death Index | |
| O240 | Ogle | HARRIET | Illinois Statewide Death Index | |
| O240 | Ogle | LEWIS FRANKLYN | Illinois Statewide Death Index | |
| O242 | Oglesby | GEORGE A | Illinois Statewide Death Index | |
| O242 | Oglesby | LEVI DOUGLAS | Illinois Statewide Death Index | |
| O242 | Oglesby | RICHARD J | Illinois Statewide Death Index | |
| O265 | Ogreen | HAROLD WM | Illinois Statewide Death Index | |
| O600 | Oharra | ROSWELL B | Illinois Statewide Death Index | |
| O650 | Ohern | ANNA F | Illinois Statewide Death Index | |
| O650 | Ohern | TIMOTHY | Illinois Statewide Death Index | |
| O525 | Ohnsman | FRED DAVID | Illinois Statewide Death Index | |
| O431 | Oldfield | GUY ALLEN | Illinois Statewide Death Index | |
| O431 | Oldfield | HILAS ALLEN | Illinois Statewide Death Index | |
| O435 | Oldham | EMMA | Illinois Statewide Death Index | |
| O435 | Oldhon | HENRY | Illinois Statewide Death Index | |
| O432 | Oldknow | ELLEN FRANCES | Illinois Statewide Death Index | |
| O425 | Oleson | MARTIN | Illinois Statewide Death Index | |
| O416 | Oliver | KENNETH HAROLD | Illinois Statewide Death Index | |
| O416 | Oliver | SARAH MARGRET | Illinois Statewide Death Index | |
| O425 | Olson | ALMA L | Illinois Statewide Death Index | |
| O425 | Olson | ANDREW | Illinois Statewide Death Index | |
| O425 | Olson | CARL DEWAYNE | Illinois Statewide Death Index | |
| O425 | Olson | CARL | Illinois Statewide Death Index | |
| O425 | Olson | FLORENCE MAY | Illinois Statewide Death Index | |
| O425 | Olson | HENRY | Illinois Statewide Death Index | |
| O425 | Olson | JOHN D | Illinois Statewide Death Index | |
| O425 | Olson | JOHN L | Illinois Statewide Death Index | |
| O425 | Olson | LAURA L | Illinois Statewide Death Index | |
| O425 | Olson | OLIVER | Illinois Statewide Death Index | |
| O425 | Olson | VIRGIL WAYNE | Illinois Statewide Death Index | |
| O540 | Oneil | THRESA MARIE | Illinois Statewide Death Index | |
| O550 | Onion | ANNA | Illinois Statewide Death Index | |
| O550 | Onion | EMORY OLIVER | Illinois Statewide Death Index | |
| O512 | Onvig | LESTER HEROLD | Illinois Statewide Death Index | |
| O546 | Onwiler | NELLIE JOSEPHINE | Illinois Statewide Death Index | |
| O100 | Opp | DOROTHEA | Illinois Statewide Death Index | |
| O100 | Opp | VETA ELIZABETH | Illinois Statewide Death Index | |
| O165 | Opperman | HARRY R | Illinois Statewide Death Index | |
| O600 | Orr | EUPEMIA A | Illinois Statewide Death Index | |
| O600 | Orr | JANE | Illinois Statewide Death Index | |
| O600 | Orr | JOHN | Illinois Statewide Death Index | |
| O600 | Orr | OLLIE M | Illinois Statewide Death Index | |
| O650 | Orum | WILLIAM MC MC CLELLN | Illinois Statewide Death Index | |
| O620 | Orwig | CHARLES EDGAR | Illinois Statewide Death Index | |
| O620 | Orwig | ELLA MAY | Illinois Statewide Death Index | |
| O620 | Orwig | FLORA A | Illinois Statewide Death Index | |
| O620 | Orwig | GEORGE FRANKLIN | Illinois Statewide Death Index | |
| O620 | Orwig | JAMES | Illinois Statewide Death Index | |
| O620 | Orwig | NETTIE B | Illinois Statewide Death Index | |
| O620 | Orwig | WILLIAM J | Illinois Statewide Death Index | |
| O620 | Orwig | WILLIAM O | Illinois Statewide Death Index | |
| O216 | Osborn | BRICE WILLEY | Illinois Statewide Death Index | |
| O216 | Osborn | GALEE | Illinois Statewide Death Index | |
| O216 | Osborn | HARRY C | Illinois Statewide Death Index | |
| O216 | Osborn | HENRY C | Illinois Statewide Death Index | |
| O216 | Osborn | JERRMIAH W | Illinois Statewide Death Index | |
| O216 | Osborne | MARY ISABELL | Illinois Statewide Death Index | |
| O220 | Oswig | LESTER HEROLD | Illinois Statewide Death Index | |
| O300 | Ott | HEISENOU | Illinois Statewide Death Index | |
| O300 | Ott | MARY | Illinois Statewide Death Index | |
| O300 | Otto | LAURA ELLA | Illinois Statewide Death Index | |
| O163 | Overdorff | ALTA | Illinois Statewide Death Index | |
| O162 | Overstreet | LESTER E | Illinois Statewide Death Index | |
| O420 | Owelk | VERA PHILIPS | Illinois Statewide Death Index | |
| O500 | Owen | AMBERS M | Illinois Statewide Death Index | |
| O500 | Owen | ANNA E | Illinois Statewide Death Index | |
| O500 | Owen | CHALLIS L | Illinois Statewide Death Index | |
| O500 | Owen | CHARLIE WILLIAM | Illinois Statewide Death Index | |
| O500 | Owen | ELIZABETH JANE | Illinois Statewide Death Index | |
| O500 | Owen | FRED | Illinois Statewide Death Index | |
| O500 | Owen | MARY | Illinois Statewide Death Index | |
| O500 | Owen | WILLIAM A | Illinois Statewide Death Index | |
| O500 | Owen | WILLIAM SPRINGER | Illinois Statewide Death Index | |
| O520 | Owens | ADA BLANCHE | Illinois Statewide Death Index | |
| O520 | Owens | ANNA | Illinois Statewide Death Index | |
| O520 | Owens | CLEON L | Illinois Statewide Death Index | |
| O520 | Owens | EDWARD T | Illinois Statewide Death Index | |
| O520 | Owens | JAMES | Illinois Statewide Death Index | |
| O520 | Owens | JOHN | Illinois Statewide Death Index | |
| O520 | Owens | OLIVER | Illinois Statewide Death Index | |
| O520 | Owens | SAMUEL | Illinois Statewide Death Index | |
| O255 | Oakman | 533, 559 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O200 | Oaks | 574 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O152 | Obenchain | 550 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O340 | Odell | 551 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O354 | Odenweller | 594 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O425 | Olson | 559 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O325 | Ottoson | 559 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O200 | Ough | 583 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O520 | Owens | 559, 575 | MCGS Newsletter, Vol. XI (1990), No. 1-4 | |
| O255 | Oakman | 850 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O152 | Obenchain | 782 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O165 | O'brian | 818 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O220 | Ochs | 814 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O354 | O'donnell | 825, 853 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O431 | Oldfield | 772 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O425 | Olson | 795 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O656 | Orner | 776 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O600 | Orr | 799 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O216 | Osborn | 791, 802, 803, 804, 830 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O216 | Osborne | 791 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O163 | Overton | 821 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O500 | Owen | 851, 861, 862 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O520 | Owens | 809 | MCGS Newsletter, Vol. XIV (1993), No. 1-4 | |
| O255 | Oakman | 31, 77 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O145 | Oblander | 77 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O165 | O'brien | 36 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O242 | Oglesbee | 14 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O265 | Ogren | 31 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O432 | Oldknow | 42, 89 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O425 | Olson | 31 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O540 | O'malley | 75 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O563 | Ommert | 75 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O216 | Osborn | 3 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O216 | Osborne | 76 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O500 | Owen | 16, 22, 29, 80, 88, 89 | MCGS Newsletter, Vol. XV (1994), No. 1-4 | |
| O130 | Offutt | Carl E. | 173 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O425 | Olson | Mrs. | 106 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O216 | Osborn | Joseph | 141 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O216 | Osborn | Soloman | 141 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O216 | Osburn | Andrew | 138 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O216 | Osburn | Charlotte | 138 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O236 | Ostermann | Henry | 176 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O500 | Owen | Leota | 139 | MCGS Newsletter, Vol. XVI (1995), No. 1-4 |
| O432 | Oldknow | Herbert | 81 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O416 | Oliver | Glenn Elwyn | 41 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O416 | Oliver | Kenneth Harold | 8 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O425 | Olson | Carrie | 55 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O425 | Olson | Jennie | 55 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O425 | Olson | Martin | 38 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O425 | Olson | Verna | 54 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O540 | O'neil | A. J. | 59 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O100 | Opp | Austin | 41 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O100 | Opp | Perry A. | 41 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O600 | Orr | Winnie | 55 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O216 | Osborn | Joseph | 80, 93 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O216 | Osborn | Larkin | 29, 60 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O216 | Osborn | Nancy | 93 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O216 | Osborn | Thomas | 22 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O500 | Owen | Ada | 91 | MCGS Newsletter, Vol. XVII (1996), No. 1-4 |
| O255 | Oakman | 80, 81 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O355 | Oatman | 42 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O235 | Ogden | 61 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O425 | Olson | 82 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O216 | Osborn | 86 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O163 | Overton | 34 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O500 | Owen | 31 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O520 | Owens | 32, 34, 61, 69 | MCGS Newsletter, Vol. XVIII (1997), No. 1-4 | |
| O240 | Oakley | 16 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O240 | Ogle | 48 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O242 | Oglesbee | 48 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O242 | Oglesby | 16 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O540 | O'neil | 45 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O132 | Opitz | 48 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O600 | Orr | 71 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O650 | Orum | 48 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O216 | Osburn | 14 | MCGS Newsletter, Vol. XXV (2004), No. 1-4 | |
| O165 | Oberman | 70 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O145 | Oblander | 52 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O600 | O???hara | 69 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O635 | Ortman | 49 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O216 | Osborn | 5 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O216 | Osborne | 52 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O300 | Otto | 76 | MCGS Newsletter, Vol. XXIII (2002), No. 1-4 | |
| O255 | Oakman | 649, 655 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O355 | Oatman | 677 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O600 | O???hara | 648 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O431 | Oldfield | 636 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O432 | Oldknow | 674 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O100 | Opp | 626 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O620 | Orwig | 657, 681 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O216 | Osborn | 641, 646, 671 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O216 | Osborne | 616 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O163 | Overton | 648 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O520 | Owens | 660 | MCGS Newsletter, Vol. XII (1991), No. 1-4 | |
| O145 | Oblander | 734 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O340 | Odel | 735 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O340 | Odell | 708, 735 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O354 | Odenweller | 735 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O354 | O???donnell | 728 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O540 | O???neil | 717, 722 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O453 | Ohlund | 705 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O636 | Oirter | 747 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O220 | Okes | 712 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O100 | Opp | 697 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O600 | Orr | 764 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O635 | Orton | 721 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O216 | Osborn | 722, 743 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O216 | Osburn | 721 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O161 | Overbay | 760 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O500 | Owen | 695, 747 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O520 | Owens | 735 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O240 | Owsley | 721 | MCGS Newsletter, Vol. XIII (1992), No. 1-4 | |
| O560 | O'meary | 75 | MCGS Newsletter, Vol. XXIV (2003), No. 1-4 | |
| O620 | Orwig | 14 | MCGS Newsletter, Vol. XXIV (2003), No. 1-4 | |
| O216 | Osburn | 33,54,55 | MCGS Newsletter, Vol. XXIV (2003), No. 1-4 | |
| O300 | Ott | 33 | MCGS Newsletter, Vol. XXIV (2003), No. 1-4 | |
| O163 | Overton | 33,75 | MCGS Newsletter, Vol. XXIV (2003), No. 1-4 | |
| O520 | Owens | 36 | MCGS Newsletter, Vol. XXIV (2003), No. 1-4 | |
| O255 | Oakman | John O. | 969 | Historical Encyclopedia of Illinois and History of McDonough County by Bateman & Selby, 1907 |
| O255 | Oakman | John S. | 969 | Historical Encyclopedia of Illinois and History of McDonough County by Bateman & Selby, 1907 |
| O145 | Oblander | Charles E. | 969-70 | Historical Encyclopedia of Illinois and History of McDonough County by Bateman & Selby, 1907 |
| O145 | Oblander | J. F. G. | 970 | Historical Encyclopedia of Illinois and History of McDonough County by Bateman & Selby, 1907 |
| O145 | Oblander | John V. | 970, P-938 | Historical Encyclopedia of Illinois and History of McDonough County by Bateman & Selby, 1907 |
| O354 | Odenweller | Isaiah | 970-1 | Historical Encyclopedia of Illinois and History of McDonough County by Bateman & Selby, 1907 |
| O650 | O.hearn | 475 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O200 | O.k. | 503 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O540 | O.neil | 484 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O255 | Oakman | 432,495 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O145 | Oblander | 475 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O340 | Odel | 488 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O354 | Odenweller | 497 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O242 | Oglesby | 488 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O436 | Older | 487 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O425 | Olson | 494,497 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O155 | Openheim | 488 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O600 | Orr | 489 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O635 | Orton | 484 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O620 | Orwig | 478 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O216 | Osborn | 470,484,493,503 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O216 | Osburn | 484 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O356 | Ottomeyer | 475 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O325 | Ottoson | 496 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O500 | Owen | 517 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O520 | Owens | 492,517 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O240 | Owsley | 484 | MCGS Newsletter, Vol. X (1989), No. 1-4 | |
| O165 | O.brian | Pat | 390 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O165 | O.brien | Jean | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O165 | O.brien | Goldie (Camden) | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O165 | O.brien | Elvie Francis | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O165 | O.brien | Eddie | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O165 | O.brien | Delthie Golden (Camden) | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O165 | O.brien | Bobbie Wayne | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O354 | O.donnell | Maggie | 385 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O560 | O.meara | .Billy. | 368 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O560 | O.meara | Fannie | 368 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O560 | O.meara | Michael (Mrs.) | 368 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O560 | O.meara | M.J. | 368 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O560 | O.meara | William | 368 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O255 | Oakman | Ruby J. | 388 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O255 | Oakman | Martha Isabelle | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O255 | Oakman | Frank (Mrs.) | 413 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O255 | Oakman | Frank | 413 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O355 | Oatman | Sarah | 425 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O355 | Oatman | Margaret | 425 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O355 | Oatman | George | 425 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O355 | Oatman | Emeline | 425 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O355 | Oatman | Catharine | 425 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O145 | Oblander | - | 360 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O235 | Ogden | Harry K. (Mrs.) | 416 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O235 | Ogden | Harry K. | 416 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O235 | Ogden | Bessie | 404 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O453 | Ohlund | Ferinand | 400 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O432 | Oldknow | Lizzie | 376 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O452 | Olmsted | Elmer D. | 364 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O425 | Olson | Mary Kay | 386 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O640 | Oreal | Elizabeth | 364 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O216 | Osborn | H.C. | 371 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O216 | Osborn | Henry S. | 371 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O500 | Owen | A.E. | 420 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O500 | Owen | Susie | 377 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O520 | Owens | Olive | 404 | MCGS Newsletter, Vol. IX (1988), No. 1-4 |
| O255 | Oakman | 49 | MCGS Newsletter, Vol. XXVI (2005), No. 1-4 | |
| O340 | Odell | 50,63 | MCGS Newsletter, Vol. XXVI (2005), No. 1-4 | |
| O216 | Osborn | 8 | MCGS Newsletter, Vol. XXVI (2005), No. 1-4 | |
| O500 | Owen | 49,50,57 | MCGS Newsletter, Vol. XXVI (2005), No. 1-4 | |
| O520 | Owens | 6,8 | MCGS Newsletter, Vol. XXVI (2005), No. 1-4 |