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| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|---|---|---|---|---|---|---|---|---|
| Owen | 34 | Ortenburg, Von | 1 | Orleans, De | 1 | Odomir | 3 | Oyley | 2 |
| Odell | 1 | Ottilia | 1 | Orleans | 1 | Overton, De | 2 | Osbern | 1 |
| Owens | 2 | Östrasien, Von | 1 | Ostrogothie | 1 | Oyly | 10 | - | - |
| Ogle | 8 | Orkney | 1 | Ostrogoths | 1 | Oyly, De | 4 | - | - |