| Name | Insgesamt | Name | Insgesamt |
|---|---|---|---|
| Osthuess | 2 | Ottilier | 1 |
| Osti | 3 | Ottinger | 3 |
| Ostini | 1 | Ottli | 1 |
| Ostner | 3 | Ottlieb | 1 |
| Ostra, von | 1 | Ottmann | 2 |
| Ostribel | 1 | Ottmar | 2 |
| Ostrup | 1 | Otto | 10 |
| Oswald | 256 | Ottojano | 1 |
| Oter | 1 | Otzenberger | 3 |
| Othenin-Girard | 3 | Ouffhousen, von | 1 |
| Othonnens | 1 | Ougsburger | 155 |
| Ott | 1411 | Oukhtomsky | 4 |
| Ott, von | 4 | Oustry | 1 |
| Ottenburg, von | 2 | Outhoorn | 3 |
| Ottenburger | 1 | Ouwer | 2 |
| Ottendorf | 82 | Overbeck, von | 1 |
| Otteney | 24 | Overney | 2 |
| Ottenfels-Gschwind, von | 2 | Overveldt, van | 1 |
| Ottenheim | 1 | Oville | 1 |
| Ottenheimer | 1 | Ovrier | 1 |
| Ottenhofer | 1 | Ow, von | 1 |
| Ottenmann | 1 | Ow zu Wachendorf, von | 1 |
| Otter | 3 | Owen | 2 |
| Otth | 105 | Owen, von | 1 |
| Otti | 34 | Owens | 1 |
| Ottiger | 2 | Owerberg | 1 |
| Ottiker | 10 | Owles | 1 |
| Ottikon, von | 1 | Ozon | 1 |