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| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|---|---|---|---|---|---|---|---|---|
| OEFELEIN | 20 | Oldham | 15 | ORENBAUGH | 2 | OSTERHAUS | 2 | Osmus | 3 |
| OLDS | 2 | Obedience | 1 | ORR | 7 | OBERMEYER | 2 | Osman | 4 |
| Oliver | 15 | Olthaus | 18 | ORCUTT | 1 | OHARA | 2 | Oskins | 1 |
| Osborn | 1 | Ormsbee | 1 | ODOM | 8 | ORRIS | 1 | Ocker | 1 |
| Overbeck | 1 | OGDEN | 1 | Oram | 17 | OTTERSDIE | 1 | - | - |
| Owens | 2 | OVERMAN | 1 | Otting | 1 | Oslem | 1 | - | - |
| Owen | 3 | OGLESBEE | 3 | OLGE | 1 | Old | 12 | - | - |
| Otz | 2 | ORTIZ | 1 | OSWALD | 1 | Osbourne | 1 | - | - |