position
| Name | Details |
|---|---|
| Oskar Onarheim | Born April 1, 1893 |
| Thorstein Opdahl | Born April 17, 1896 in Tysnes |
| Lars Larsen Oppedal | Born December 14, 1882 in Ullensvang |
| John Brynjulf Opsahl | Born September 8, 1892 in Flekkefjord |
| Sverre Kjell Opsahl | Born April 8, 1923 in Sarpsborg |
| Erling Moe Ordahl | Born January 20, 1918 in Søndeled |
| Hans Ormestad | Born August 24, 1887 in Sandar |
| Agnar Pedersen Orten | Born July 12, 1901 in Aukra |
| Henry Kling Ortveit | Born February 13, 1909 in Horten |
| Jens Amandus Beck Oscarsen | Born January 2, 1891 in Balsfjord |
| Harry Rasmus Ose | Born March 30, 1915 in Trondfjem |
| Arthur Kristian Osmundsen | Born June 16, 1894 in Kristiansand |
| Conrad Louis Osmundsen | Born December 31, 1911 in Stavanger |
| Laurits Johan Otto Osmundsen | Born February 26, 1888 in Hetland |
| Håkon Osnes | Born June 26, 1910 in Ulstein |
| Ottar Edvin Os | Born November 24, 1891 in Hitra |
| Gustav Osuldsen | Born April 5, 1852 in Fjære |
| Jørgen Osuldsen | Born February 1, 1846 in Fjære |
| Knud Osuldsen | Lived in Østre Vallesverd |
| Otto Theodor Osuldsen | Born December 2, 1865 in Fjære |
| Salve Osuldsen | Born December 4, 1838 in Fjære |
| Ottesen | Lived in Øvregate, Lillesand |
| Andreas Ottesen | Born October 26, 1887 |
| Einar Rosenkrantz Ottesen | Born February 1, 1898 |
| Thoralf Essendrop Ottesen | Born March 22, 1883 in Høiland sogn |