| Name | Case# | Date Filed |
| O'Hara, Cercle | 508 | |
| O'Neal, James | 24 | 22 Sep 1902 |
| Olive, M. L. Mrs. | 870 | |
| Oran, J. T. | 784 | |
| Oran, Nettie Anne | 932 | |
| Overholtzer, M. P. | 283 | 1908 |
| Overstreet, A. J. | 112 | |
| Overstreet, Lela B. | 153 | 3 Oct 1905 |
| Overstreet, Leroy Edgar | 714 | |
| Owen, Thomas B. | 228 | 11 July 1907 |
| Owensby, B. | 820 | |