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'Brien, Jonathan S. | 28 | 14A | 55 | O165
| |
| Name | Line | Page | District | Soundex
| Odd, Arthur H. | 11 | 1A | 54 | O300
| Odd, Charles | 17 | 7A | 54 | O300
| Odd, Newman | 91 | 11B | 51 | O300
| Odell, J. Fred | 56 | 13B | 56 | O340
| |
| Name | Line | Page | District | Soundex
| Ogawa, Hikotaro | 25 | 13A | 51 | O200
| Ogden, Abraham M. | 80 | 3B | 54 | O235
| Ogden, Joseph H. | 89 | 4B | 52 | O235
| Ogden, William | 71 | 4B | 51 | O235
| |
| Name | Line | Page | District | Soundex
| Ohlwiler, Elzina | 75 | 6B | 49 | O446
| |
| Name | Line | Page | District | Soundex
| Okawa, Kakutaro | 45 | 13A | 51 | O200
| Okuda, Shungo | 91 | 8B | 51 | O230
| |
| Name | Line | Page | District | Soundex
| Oleson, Ole C. | 7 | 8A | 52 | O425
| Olmsted, Maud | 38 | 5A | 51 | O452
| Olson, Kimble A. | 50 | 9A | 55 | O425
| |
| Name | Line | Page | District | Soundex
| Openshaw, Joseph | 9 | 14A | 54 | O152
| |
| Name | Line | Page | District | Soundex
| Orton, Joseph A. | 60 | 9B | 52 | O635
| Orvin, Royal C. | 42 | 3A | 54 | O615
| |
| Name | Line | Page | District | Soundex
| Osaki, Kotaro | 93 | 1B | 52 | O220
| |
| Name | Line | Page | District | Soundex
| Oviatt, Lewis H. | 38 | 5A | 53 | O130
| |
| Name | Line | Page | District | Soundex
| Owen, Charles | 14 | 7A | 54 | O500
| Owen, Ernest C. | 51 | 12B | 55 | O500
| Owens, Samuel P. | 25 | 5A | 52 | O520
| |
| Name | Line | Page | District | Soundex
| Ozaki, Szki | 39 | 14A | 51 | O220
| |