| Name | Born | Place of birth (place of living shown if missing) | |
|---|---|---|---|
| Johan S. Olsen | Lived in Bergen | ||
| Bjarne Olsen Lillebø | Lived in Bergen | ||
| Nils Olsen | December 12, 1869 | Born in Dypvaag (Flosta) | |
| NIls Axel Olsen | Lived in Danmark | ||
| Nils Johan Olsen | September 21, 1856 | Born in Dypvåg | |
| Olaf Olsen | Lived in Fredrikstad | ||
| Ole Kristian Olsen | May 13, 1894 | Lived in Åkerøya | |
| Oluf Olsen | Lived in Oslo | ||
| Oluf M. Olsen | Lived in Drammen | ||
| Oscar Olsen | September 3, 1896 | Lived in Arendal | |
| Oscar Olsen | Lived in Drammen | ||
| Otto Laurensius Olsen | Lived in Tjøme | ||
| Otto Moe Olsen | 1893 | Lived in Porsgrunn | |
| Paul Olsen | Lived in Kristiansand | ||
| Thomas Olsen | Lived in Brevik | ||
| Trygve Olsen | Lived in Oslo | ||
| F. G. Olson | Lived in Sverige | ||
| Ernst Olsson | Lived in Stockholm, Sverige | ||
| Karl Olsson | Lived in Sverige | ||
| Johan Olufsen | Lived in Hadsel | ||
| Ah On | Lived in Kina | ||
| Karl Fredrik Opperud | July 17, 1901 | Lived in Skoger | |
| Ludvig Ottem | Lived in Trondheim | ||
| Bernt Johan Ovesen | Lived in Trondheim |