| Naam | Aantal | Naam | Aantal |
|---|
| Obbens | 3 | Olerink | 1 |
| Obucina | 1 | Olers | 10 |
| Ocasiones | 1 | Olers (Jansen) | 1 |
| Ocasiones Avellana | 1 | Olfers | 2 |
| Ockels | 1 | Olffen | 1 |
| Ockersse | 1 | Olgers | 5 |
| Ockes | 3 | Olijve | 1 |
| Odijk | 3 | Olinck | 1 |
| Oedses | 1 | Oling | 1 |
| Oegema | 1 | Olinga | 1 |
| Oei | 1 | Olingh | 2 |
| Oene, Van | 2 | Olings | 1 |
| Oenen, van | 1 | Oliver | 7 |
| Oenes | 1 | Olman | 1 |
| Oeseburg | 1 | Olphen, van | 3 |
| Oest | 9 | Olsder | 22 |
| Oestervold | 2 | Olsen | 2 |
| Oetara | 5 | Olthof | 32 |
| Oetiker | 1 | Olthoff | 2 |
| Oever, ten | 1 | Olthuis | 1 |
| Oeveren, van | 3 | Oltmans | 12 |
| Oevering | 1 | Oltrop | 2 |
| Oevermans | 3 | Olyslager | 2 |
| Offens | 4 | Omis | 5 |
| Offeringa | 2 | Ommen, van | 4 |
| Offringa | 3 | Ommering, van | 2 |
| Ofte Ellersingh | 1 | Omveld | 2 |
| Ohlen | 1 | Omvlee | 7 |
| Ohlse, ter | 1 | Onderdijk | 8 |
| Ohlsen | 7 | Onderstal | 1 |
| Okken | 40 | Onnes | 4 |
| Okkens | 1 | Onrust | 36 |
| Okkes | 4 | Onstwedder | 37 |
| Olbers | 1 | Onweer | 5 |
| Oldebeuving | 13 | Onweer (Siks) | 2 |
| Oldeboom | 19 | Onzenoort, van | 1 |
| Oldegbers | 11 | Oolders | 31 |
| Oldekamp | 4 | Oolers | 1 |
| Oldekerken | 1 | Oomen | 1 |
| Oldenbeuving | 3 | Oomes | 1 |
| Oldenborger | 1 | Oomkes | 3 |
| Oldenburg | 5 | Ooms | 1 |
| Oldenburger | 55 | Oorburg | 1 |
| Oldengarm | 7 | Oord | 2 |
| Oldenkamp | 5 | Oord, van | 1 |
| Oldenmenger | 2 | Oorker | 4 |
| Oldenziel | 16 | Oorkes | 1 |
| Olders | 4 | Oorlog | 10 |
| Oldersma | 1 | Oorsburg | 1 |
| Oldigh | 3 | Oort | 1 |
