| Oaks, Living (~1904-) |
| Oaks, Living |
| Ocenarchek, Anna Marie (~1881-) |
| Ocenarchek, Elsie (~1881-) |
| Ocenarchek, Karl (~1836-1892) |
| Odinsels, Isabel (~1228-) |
| Odiorne, Sarah (~1696-) |
| Oldhaugh, _____ (~1350-) |
| Oliver, John (~1584-) |
| Olmstead, Rebecca (~1625-1689) |
| Olmsted, James (1500-) |
| Olmsted, James (1520-1595) |
| Olmsted, James (~1559-1595) |
| Olmsted, John (~1448-) |
| Olmsted, John (~1334-) |
| Olmsted, Richard (~1391-) |
| Olmsted, Richard (1579-1641) |
| Olney, John (~1411-) |
| Olney, Mary (~1468-) |
| Olsdotter, Elna (1765-1821) |
| Olsdotter, Gertrud (1825-1828) |
| Olsdotter, Gertrud (1832-) |
| Olsdotter, Kerstin (~1762-) |
| Olsdotter, Kerstin (~1722-) |
| Olsen, Living (~1888-) |
| Olsfdotter, Ana (~1710-) |
| Olson, Alfred (~1853-) |
| Olson, Anna (1868-1951) |
| Olson, Elna (1864-) |
| Olson, Elna (1855-1858) |
| Olson, Hanna (1870-) |
| Olson, Hans (1817-1882) |
| Olson, Herman (1866-) |
| Olson, Johannes (1862-) |
| Olson, Johannes (1855-1862) |
| Olson, Maria (1872-) |
| Olson, Nils (1857-) |
| Olson, Oskar (1861-) |
| Olsson, Anders (1820-) |
| Olsson, Anna Maja (1724-1790) |
| Olsson, Hans Joseph (1868-1868) |
| Olsson, Jeppe (1800-) |
| Olsson, Nils (1823-) |
| Ordway, Franklin (-) |
| Ordway, Hattie (~1847-) |
| Osborn, Azuba (~1810-1872) |
| Osborne, Mary (~1598-) |
| Osgood, John (~1622-) |
| Osgood, John (~1614-) |
| Osgood, Sarah (~1613-) |
| Osias, Catherine Elizabeth (1735-1793) |
| Otto, Gottleib (~1824-) |
| Otto, Ida Anne (~1864-) |
| Overton, Cutler Guthlac (1496-1536) |
| Overton, Cutler (~1417-) |
| Overton, Isabel (1608-1661) |
| Overton, John (~1346-) |
| Overton, Rose (~1483-) |
| Overton, Thomas (1402-) |
| Overton, Valentine (1567-1647) |
| Overton, William (1532-) |
| Overton, William (~1289-) |
| Overton, William (1455-1486) |