| Obreen* | 's-Gravenhage, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 1 |
| Oelen* | Hoogeveen, Drenthe | [Gebroken link?] | [Personen] | Score: 1 |
| Oever, van den* | Bolsward, Friesland | [Gebroken link?] | [Personen] | Score: 2 |
| Offereins* | Diever, Drenthe | [Gebroken link?] | [Personen] | Score: 2 |
| Offermans* | | [Gebroken link?] | [Personen] | Score: 1 |
| Okkens* | Scheemda, Groningen | [Gebroken link?] | [Personen] | Score: 3 |
| Oldenburger* | Achtkarspelen, Friesland | [Gebroken link?] | [Personen] | Score: 2 |
| Olivieira* | | [Gebroken link?] | [Personen] | Score: 1 |
| Olree* | Bruinisse, Zeeland | [Gebroken link?] | [Personen] | Score: 1 |
| Olsder* | Midwolda, Groningen | [Gebroken link?] | [Personen] | Score: 2 |
| Olzheim* | Margraten, Limburg | [Gebroken link?] | [Personen] | Score: 2 |
| Ommen, van* | Heerde, Gelderland | [Gebroken link?] | [Personen] | Score: 1 |
| Ommeren, van* | Lienden, Gelderland | [Gebroken link?] | [Personen] | Score: 2 |
| Onderdelinden* | Dordrecht, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 3 |
| Onderstal* | Apeldoorn, Gelderland | [Gebroken link?] | [Personen] | Score: 2 |
| Onderwater* | Zoeterwoude, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 3 |
| Onneweer* | Noord-Holland | [Gebroken link?] | [Personen] | Score: 5 |
| Onstwedder* | Pekela, Groningen | [Gebroken link?] | [Personen] | Score: 2 |
| Ooijevaar* | Noord-Holland | [Gebroken link?] | [Personen] | Score: 4 |
| Ooms* | Zevenhuizen, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 4 |
| Ooms* | Halsteren, Noord-Brabant | [Gebroken link?] | [Personen] | Score: 3 |
| Oonk* | Winterswijk, Gelderland | [Gebroken link?] | [Personen] | Score: 3 |
| Oorschot, van* | Zwolle, Overijssel | [Gebroken link?] | [Personen] | Score: 2 |
| Oort* | Giethoorn, Overijssel | [Gebroken link?] | [Personen] | Score: 1 |
| Oortman* | Uithuizermeeden, Groningen | [Gebroken link?] | [Personen] | Score: 3 |
| Oortmerssen, van* | Zwolle, Overijssel | [Gebroken link?] | [Personen] | Score: 3 |
| Oost* | Steenwijk, Overijssel | [Gebroken link?] | [Personen] | Score: 6 |
| Oost* | Ooststellingwerf, Friesland | [Gebroken link?] | [Personen] | Score: 1 |
| Oost* | Hengelo, Overijssel | [Gebroken link?] | [Personen] | Score: 2 |
| Oost* | Marum, Groningen | [Gebroken link?] | [Personen] | Score: 2 |
| Oost, van* | Rotterdam, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 2 |
| Oosten* | Lemsterland, Friesland | [Gebroken link?] | [Personen] | Score: 2 |
| Oostenbrink* | Amsterdam, Noord-Holland | [Gebroken link?] | [Personen] | Score: 4 |
| Oostenbrugge, van* | Dirksland, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 2 |
| Oosterbeek* | Tienhoven, Utrecht | [Gebroken link?] | [Personen] | Score: 1 |
| Oosterbeek* | Soest, Utrecht | [Gebroken link?] | [Personen] | Score: 6 |
| Oosterhof* | Smilde, Drenthe | [Gebroken link?] | [Personen] | Score: 1 |
| Oosterholt* | Haaksbergen, Overijssel | [Gebroken link?] | [Personen] | Score: 2 |
| Oosterhout, van* | Deurne, Noord-Brabant | [Gebroken link?] | [Personen] | Score: 2 |
| Oosterhuis* | Nieuwolda, Groningen | [Gebroken link?] | [Personen] | Score: 1 |
| Oosterhuis* | Scheemda, Groningen | [Gebroken link?] | [Personen] | Score: 3 |
| Oosterink* | Nunspeet, Gelderland | [Gebroken link?] | [Personen] | Score: 6 |
| Oosterink* | Zelhem, Gelderland | [Gebroken link?] | [Personen] | Score: 6 |
| Oosterink* | Zelhem, Gelderland | [Gebroken link?] | [Personen] | Score: 2 |
| Oosterlee* | 's-Gravenzande, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 3 |
| Oosterman* | Amsterdam, Noord-Holland | [Gebroken link?] | [Personen] | Score: 5 |
| Oosterveld* | Haren, Groningen | [Gebroken link?] | [Personen] | Score: 1 |
| Oosterveld* | Winsum, Groningen | [Gebroken link?] | [Personen] | Score: 2 |
| Oosting* | Roden, Drenthe | [Gebroken link?] | [Personen] | Score: 4 |
| Oosting* | Anloo, Drenthe | [Gebroken link?] | [Personen] | Score: 3 |
| Oosting* | Vries, Drenthe | [Gebroken link?] | [Personen] | Score: 3 |
| Oostrum, van* | Houten, Utrecht | [Gebroken link?] | [Personen] | Score: 2 |
| Ooststroom, van* | Nieuwerkerk aan den IJssel, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 2 |
| Oostvogels* | Zundert, Noord-Brabant | [Gebroken link?] | [Personen] | Score: 1 |
| Ordelman* | Neede, Gelderland | [Gebroken link?] | [Personen] | Score: 6 |
| Ordelmans* | Neede, Gelderland | [Gebroken link?] | [Personen] | Score: 7 |
| Ort* | Nijmegen, Gelderland | [Gebroken link?] | [Personen] | Score: 6 |
| Oskam(p)* | Ameide, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 1 |
| Osten* | Vlissingen, Zeeland | [Gebroken link?] | [Personen] | Score: 4 |
| Otten* | Emmen, Drenthe | [Gebroken link?] | [Personen] | Score: 1 |
| Otten* | Loosdrecht, Noord-Holland | [Gebroken link?] | [Personen] | Score: 3 |
| Ottenhof* | Denekamp, Overijssel | [Gebroken link?] | [Personen] | Score: 2 |
| Ottens* | Gasselte, Drenthe | [Gebroken link?] | [Personen] | Score: 3 |
| Otter, den* | Den Dungen, Noord-Brabant | [Gebroken link?] | [Personen] | Score: 7 |
| Otterlo, van* | Gelderland | [Gebroken link?] | [Personen] | Score: 5 |
| Ottervanger* | Rotterdam, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 5 |
| Oudenes* | Berkenwoude, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 3 |
| Oudijn* | Hendrik-Ido-Ambacht, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 1 |
| Ouwens* | Rotterdam, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 2 |
| Overbeek* | Rotterdam, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 3 |
| Overbeeke* | Sint Annaland, Zeeland | [Gebroken link?] | [Personen] | Score: 1 |
| Overhof(f)* | | [Gebroken link?] | [Personen] | Score: 2 |
| Overkleeft* | 's-Gravenhage, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 2 |
| Oversloot* | 's-Gravenzande, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 2 |
| Overweel* | Maasdam, Zuid-Holland | [Gebroken link?] | [Personen] | Score: 1 |
