| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | William Eldred•Berntsen | |
| Used name | William•Berntsen | |
| Born | 25 March 1912 in Jersie, Solrød, Sjælland |  DEN |
| Died | 14 September 1994 (aged 82 years 5 months 20 days) in Frederikssund, Hovedstaden | DEN |
| Measurements | 170 cm / 70 kg | |
| Affiliations | Hellerup Sejlklub — Gentofte, Hovedstaden | DEN |
| Frederikssund Sejlklub — Frederikssund, Hovedstaden | DEN | |
| NOC | Denmark | DEN |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 1 |
| Total | 2 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Sailing | DEN |
William Berntsen | |||
| Three-Person Keelboat, Open (Olympic) | Snap | 3 | Bronze | |||
| 1952 Summer Olympics | Sailing | DEN |
William Berntsen | |||
| Three-Person Keelboat, Open (Olympic) | Snude | 5 | ||||
| 1960 Summer Olympics | Sailing | DEN |
William Berntsen | |||
| Three-Person Keelboat, Open (Olympic) | Web II | 2 | Silver | |||
| 1964 Summer Olympics | Sailing | DEN |
William Berntsen | |||
| Three-Person Keelboat, Open (Olympic) | Web III | 12 | ||||
| 1968 Summer Olympics | Sailing | DEN |
William Berntsen | |||
| Three-Person Keelboat, Open (Olympic) | Denmark | 13 |
