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| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|---|---|---|---|---|---|---|---|---|
| Owens | 22 | Odacer | 1 | Olafsdottir | 1 | Odingsels | 2 | Oitker | 1 |
| Ognal | 1 | Ortengau | 1 | Orlans | 1 | OLDENBURG | 3 | OLIVE | 1 |
| Osbaldiston, Esq | 1 | Oda | 3 | Odinsels | 1 | OLDENBURG-DELMENHORST | 2 | Odensels | 1 |
| Osborne | 2 | Ordgar | 2 | Onchu | 1 | OGILVIE | 1 | Osborn | 1 |
| Otto | 3 | Oslac | 1 | Olchaoin | 1 | OLAFSDATTER | 2 | Orde | 1 |
| Oliba Ii | 1 | Oliba I | 1 | Ozursdottir | 1 | Offutt | 1 | OVERTON | 4 |
| Ornold I | 1 | OttoI, the Great | 1 | Ommert | 1 | Okeover | 1 | OLAFSSON KING OF MAN | 1 |
| Orleans | 3 | Owain | 7 | Olavsdottir | 1 | OGLESBEE | 1 | OSULE | 1 |
| Oilly | 10 | Outremer | 1 | Olaf | 1 | Opland | 8 | OREAR | 1 |
| Olafsson | 14 | Oleg | 1 | Oaks | 2 | Owen | 5 | OLSEEN | 3 |
| Offa | 1 | Ottarsson | 1 | Okehampton | 1 | Ollie | 2 | - | - |
| Ostrogotha Of Th | 1 | Odele | 1 | Okeston | 1 | Oliver | 1 | - | - |