| O'brien, Edward | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Brien, John | (2-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Connell, Julia | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Connell, Matthew | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Connell, Robert | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Cornnell, Honora | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Farrell, Richard John | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| O'Neal, James | (2-whrsreel) | Union Village, OH | Search: Full Last First | |
| Obrien, Henry | (4-whrsreel) | Union Village, OH | Search: Full Last First | |
| OBrien, Ozzie | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Obry, Frank . | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Offinger, Martin or Rifinger | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Oldfield, Jemima | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Oldfield, Joseph | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Oldfield, Martha | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Oldham, Mark | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Amanda | (2-sqtrlyobits) | Union Village, OH | Search: Full Last First | |
| Olmstead, Anna | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Damaris | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Ebenezer | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, John S. | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Lucetta | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Maria | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Russell | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Olmstead, Thadeus | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Ormsby, Charles | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Osborn, Jerry | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Osborne, Lovina | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Oscar, Lawrence | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Osgood, Charles H. | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Owens, Ida May | (1-whrsreel) | Union Village, OH | Search: Full Last First | |
| Ozell, Jacob | (1-whrsreel) | Union Village, OH | Search: Full Last First |