| Roles | Non-starter |
|---|---|
| Sex | Male |
| Full name | Frithjof Gunnar•Johnsen |
| Used name | Frithjof•Johnsen |
| Other names | Fridtjof Birkheim |
| Born | 18 June 1903 in Sandvika, Bærum, Viken (NOR) |
| Died | 1 June 1983 in Oslo, Oslo (NOR) |
| Measurements | 74 kg |
| Affiliations | Bærum Roklubb, Sandvika, Bærum (NOR) |
| NOC | Norway |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1924 Summer Olympics | Rowing | NOR |
Frithjof Johnsen | |||
| Coxed Fours, Men (Olympic) | Norway |