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| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|---|---|---|---|---|---|---|---|---|
| Orell | 2 | Oilly II | 1 | Ordonez | 2 | Ordrad | 1 | Orlamunda, Of | 1 |
| Okle | 2 | Ohningen, Of | 2 | Otto | 1 | Odin\Woden | 1 | Oreguen | 1 |
| Otis | 3 | Orviedo Diego | 1 | Ordgar | 1 | Offa | 1 | Owen | 1 |
| Osbaldeston | 1 | Oterleve | 1 | Olderado | 1 | Olaf Of Dublin | 1 | - | - |
| Orm | 1 | Oltigen, Of | 1 | Olafsson | 1 | Ode | 1 | - | - |
| Oilly | 2 | Ostmark, The | 1 | Orleans, Of | 2 | Osborn | 2 | - | - |