| This one is John O' Brien married Indian Squaw ca 1746 but newspaper date is Sept 13 1860 | |||
| O'conner | William | Bridge Renslla | July 6 1861 |
| Odion | Henry w. | Bertha spooner | oct 31 1878 |
| oldrin | edward jr. | helena jane mcdonald | july 3 1867 |
| oldrin | j. merwin | clara s. randall | nov 10 1869 |
| olds | daniel s. | emma stuart | dec 21 1863 |
| oliver | anthony | esther ann thompson | oct 14 1869 |
| oliver | arthur d. | mary f. moore | nov 6 1867 |
| oliver | thomas s. | martha a. whaley | aug 3 1864 |
| onderdonk | benjamin | caroline pomeroy | july 25 1875 |
| onderdonk | horatio g. | ann k. cortelyou | jan 28 1859 |
| osborn | thomas g | maria j. cook | sept 16 1858 |
| overton | john c. | maria adelia sherman | nov 4 1858 |