| Naam | Aantal | Naam | Aantal |
|---|
| Obbes | 1 | Ohringer | 3 |
| Oberlander | 1 | Oijen, van | 1 |
| Obermann | 1 | Ojevaar | 1 |
| Obernbreit | 1 | Ok | 1 |
| Oberski | 1 | Okel | 1 |
| Oberstein | 11 | Okker | 24 |
| Obler | 1 | Okkerse | 1 |
| Obstfeld | 12 | Oksenberg | 7 |
| Ochs | 1 | Olasz | 1 |
| Ochse | 1 | Olberg | 4 |
| Ockeloen | 1 | Olde Agterhuis | 1 |
| Ocken | 2 | Oldenburg | 3 |
| Ockersen | 14 | Oldenburger | 2 |
| Ockhuisen | 1 | Oldenhof | 1 |
| Oczeret | 4 | Oldenhuis | 1 |
| Oddens | 1 | Olff | 2 |
| Odenkirchen | 2 | Olie | 2 |
| Odewald | 16 | Olieroock | 2 |
| Odink | 1 | Olij | 2 |
| Odinot | 1 | Olijslager | 1 |
| Oeb Brandon | 3 | Oliveira | 2 |
| Oëb Pires | 2 | Oliveira, d' | 1 |
| Oedekerk | 1 | Oliveira, de | 28 |
| Oel, van | 1 | Olivier | 21 |
| Oelbers | 1 | Oljans | 1 |
| Oellers | 1 | Olleman | 1 |
| Oellrich | 1 | Ollier | 3 |
| Oelp | 1 | Olman | 47 |
| Oenen, van | 4 | Olschwanger | 1 |
| Oers, van | 2 | Olsen | 3 |
| Oest, van | 1 | Olst, van | 1 |
| Oesteren, van | 13 | Olthof | 2 |
| Oesterman | 64 | Olthoff | 1 |
| Oever, ten | 1 | Olthuizen | 1 |
| Oever, van den | 1 | Oltmans | 4 |
| Oeveren, van | 7 | Omer | 1 |
| Oezer | 2 | Omme, van | 2 |
| Offenbach | 12 | Omroeper | 1 |
| Offenbacher | 1 | Onclin | 2 |
| Offerhaus | 1 | Onderwijzer | 52 |
| Offermans | 1 | Onnen | 3 |
| Offermeijer | 2 | Onona | 1 |
| Offwood | 1 | Onselder, van | 1 |
| Ofman | 1 | Onsia | 2 |
| Ogenia | 1 | Önsöz | 3 |
| Oger | 1 | Onwijn | 1 |
| Oheb | 1 | Onzen, van | 2 |
| Oheb Brandon | 2 | Ooijen, van | 7 |
| Ohm | 1 | Oomens | 1 |
| Ohnemuller | 1 | Ooms | 4 |
