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| Name | Total | Name | Total | Name | Total | Name | Total | Name | Total |
|---|---|---|---|---|---|---|---|---|---|
| Ockes | 11 | Olphing | 1 | Onink | 4 | Orlamünde, von | 1 | Overrijnder | 1 |
| Oebeles | 2 | Olphing Olfen | 1 | Ooijens (of Ooijes, Ooyes, Oyes, Ojens) | 2 | Ossenbroeck, Van | 2 | Oyes | 16 |
| Oldenburg | 2 | Oltman | 1 | Oosten, van | 2 | Otten | 2 | Oyes (of Ooyes) | 2 |
| Oldenburger | 1 | Ommeren, van | 5 | Opper Lotharingen, van | 1 | Ottens | 3 | - | - |
| Oldenziel | 18 | Onbekend | 3 | Orlamünde | 2 | Otter, Den | 2 | - | - |