| Name | Insgesamt | Name | Insgesamt |
|---|---|---|---|
| Ostermann | 5 | Otth | 109 |
| Ostermeier | 8 | Otti | 34 |
| Ostermeyer | 1 | Ottiger | 4 |
| Ostermund | 1 | Ottiker | 10 |
| Ostermundigen, von | 1 | Ottikon, von | 1 |
| Osterreuter | 2 | Ottilier | 1 |
| Osterrieth | 13 | Ottinger | 3 |
| Ostertag | 22 | Ottli | 1 |
| Osterwald | 73 | Ottlieb | 1 |
| Osterwalder | 13 | Ottmann | 2 |
| Ostheim, von | 1 | Ottmar | 2 |
| Osthuess | 2 | Otto | 16 |
| Osti | 3 | Ottojano | 1 |
| Ostini | 1 | Ottwiler | 1 |
| Ostner | 3 | Otzenberger | 3 |
| Ostra, von | 1 | Ouffhousen, von | 1 |
| Ostribel | 1 | Ougsburger | 155 |
| Ostrup | 1 | Oukhtomsky | 4 |
| Oswald | 267 | Oustry | 1 |
| Oter | 1 | Outhoorn | 3 |
| Othenin-Girard | 3 | Ouwer | 2 |
| Othonnens | 1 | Overbeck, von | 1 |
| Ott | 1413 | Overney | 2 |
| Ott, von | 4 | Overveldt, van | 1 |
| Ottenburg, von | 2 | Oville | 1 |
| Ottenburger | 1 | Ovrier | 1 |
| Ottendorf | 89 | Ow, von | 1 |
| Otteney | 24 | Ow zu Wachendorf, von | 1 |
| Ottenfels-Gschwind, von | 2 | Owen | 2 |
| Ottenheim | 1 | Owen, von | 1 |
| Ottenheimer | 1 | Owens | 1 |
| Ottenhofer | 1 | Owerberg | 1 |
| Ottenmann | 1 | Owles | 1 |
| Otter | 3 | Ozon | 1 |