| Oebele | 04-08-1965 | Opende |
| Okje | 16-03-1923 | Peebos |
| Okke | 27-07-1902 | Den Ham |
| Onne | 04-02-1863 | Doezum |
| Onne | 20-01-1909 | Noordwijk |
| Onne | 13-06-1911 | Noordwijk |
| Onne | 05-08-1926 | Doezum |
| Onne | 14-03-1928 | Doezum |
| Onne | 05-04-1944 | Kornhorn |
| Onne (Ernie) | 05-05-1948 | Warffum |
| Onne Hendrik | 31-07-1965 | Doezum |
| Onno Cornelis | 07-08-1968 | Groningen |
| Otto | 06-05-1954 | Groningen |
| Outse (= stamvader) | ca 1600 | |
| Outse Popkes | 30-01-1648 | Grootegast |
01-09-2015: 15 personen
