| William O'BARR (1800-1862) | & | Frances ADAMS (1800-1877) |
| Rev Archibald ODOM (1798-1873) | & | Isabella Elizabeth ANDERSON (1796-1878) |
| Aron G. ODOM (1819-1894) | & | Mahala HALL (1823-1905) |
| Elijah Samuel ODOM (1816-1873) | & | Rutha GOFF (1812-1895) |
| Artemus Watson OGILVIE (1805-1855) | & | Frances Emily ARNOLD (1821-1849) |
| William Henry OGLE (1866-1901) | & | Mary Elizabeth PEARSON (1869-1920) |
| Richard OGLESBEE (????-1800) | & | Ann (????-1801) |
| Henry Goodwin O'KEEFE (1906-1962) | & | Willie Mae Ola BAGGETT (1907-1986) |
| John Dennis O'KEEFE (1879-1953) | & | Frances Ellender ABERCROMBIE (1881-1959) |
| John R. O'KEEFE (1834-????) | & | Luvenia VINES (1847-????) |
| Francis Marion OLIVER (1859-1941) | & | Martha EDMONDSON (1863-????) |
| James O'NEAL (1814-1861) | & | Emily Jane (1821-1880) |
| James Jackson O'NEAL (1839-1907) | & | Izabell Delila McVEIGH (1845-1897) |
| Elias O'QUINN (????-????) | & | Mattie E. WHIDDON (1884-????) |
| John Bunyan ORR (1808-1885) | & | Rebecca Keziah A. C. SCOTT (1818-1885) |
| James OSBORN (1801-1852) | & | Ann JOHNSON (1802-1870) |
| Peter Dolphus OUTLAW (1833-1920) | & | Margaret Ann Letticia BOLTON (1841-1922) |
| George Frederick OWEN (1913-1991) | & | Frances Wilmotine McDUFFIE (1916-2001) |
| George Washington OWEN (1802-1882) | & | Delilah Jane WARD (1835-1918) |
| Guy Henry OWEN (1892-1947) | & | Freddie Mae LEIBING (1894-1981) |
| John C. OWEN[S] (1837-1900) | & | Jenny Ann FITTS (1845-1877) |
| Benjamin Franklin OWENS (1821-1883) | & | Elizabeth MARSH (1830-1920) |
| James Jefferson OWENSBY (1859-1917) | & | Lula Belle FREEMAN (1866-1943) |
| Thomas OWENSBY (1809-1886) | & | ? (????-1846) |
| Thomas OWENSBY (1809-1886) | & | Mary E. DOBBINS (1831-1902) |