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| Name | Total | Name | Total |
|---|---|---|---|
| Oakley | 2 | Orick | 1 |
| Oaks | 3 | Orman | 1 |
| Oberthier | 1 | Ormes | 1 |
| Ochs | 1 | Orr | 17 |
| Ockels | 5 | Ortiz | 1 |
| Odell | 3 | Osbirn | 4 |
| Oden | 1 | Osbon | 2 |
| Odom | 2 | Osborn | 21 |
| Odum | 1 | Osborne | 3 |
| Ogden | 2 | Osburn | 4 |
| Ogrin | 1 | Osteen | 36 |
| Oguin | 1 | Ostein | 1 |
| Oiley, D' | 1 | Ostin | 1 |
| Oldham | 6 | Ostrander | 1 |
| Oldroyd | 2 | Ottinger | 8 |
| Oliphant | 2 | Otts | 1 |
| Olita | 2 | Otwell | 3 |
| Olivarez | 1 | Oughton | 1 |
| Olive | 5 | Overton | 9 |
| Oliver | 49 | Owen | 7 |
| Ollis | 1 | Owens | 21 |
| Olney | 1 | Owensby | 11 |
| Olsson | 1 | Ownsby | 2 |
| Oney | 2 | Oxedine | 1 |
| Oots | 1 | Oxley | 1 |
| Oren | 3 | Ozley | 1 |