Second Letter Index
| Oa | Ob | Oc | Od | Oe | Of | Og | Oh | Oi | Oj | Ok | Ol | Om
| On
| Oo
| Op
| Oq
| Or
| Os
| Ot
| Ou
| Ov
| Ow
| Ox
| Oy
| Oz
| |
| Name | Line | Page | District | Soundex
| O'Neil, Samuel | 96 | 8B | 140 | O540
| |
| Name | Line | Page | District | Soundex
| Oaks, John | 5 | 6A | 137 | O200
| |
| Name | Line | Page | District | Soundex
| Offret, Yves M. | 51 | 2B | 136 | O163
| |
| Name | Line | Page | District | Soundex
| Ohlwiler, Eliza J. | 2 | 20A | 139 | O446
| Ohlwiler, John F. | 14 | 13A | 139 | O446
| |
| Name | Line | Page | District | Soundex
| Olofson, Olof | 32 | 7A | 139 | O412
| Olson, Anton | 13 | 15A | 139 | O425
| Olson, Betsy | 23 | 15A | 139 | O425
| Olson, George | 74 | 9B | 139 | O425
| |
| Name | Line | Page | District | Soundex
| Orgill, Joseph | 71 | 5B | 137 | O624
| Orrock, John W. | 44 | 8A | 140 | O620
| |
| Name | Line | Page | District | Soundex
| Overholt, Sarah E. | 35 | 12A | 139 | O164
| |