| Roles | Competed in Intercalated Games | |
|---|---|---|
| Sex | Male | |
| Full name | Nils Gustaf•Regnell | |
| Used name | Nils•Regnell | |
| Born | 18 December 1884 in Stockholm, Stockholm |  SWE |
| Died | 14 November 1950 (aged 65 years 10 months 27 days) in Jersey City, New Jersey |  USA |
| Measurements | 170 cm | |
| Affiliations | Stockholms KK — Stockholm, Stockholm | SWE |
| NOC | Sweden | SWE |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1906 Intercalated Games | Swimming (Aquatics) | SWE |
Nils Regnell | |||
| 400 metres Freestyle, Men (Intercalated) | ||||||
| 1,500 metres Freestyle, Men (Intercalated) | ||||||
| 4 × 250 metres Freestyle Relay, Men (Intercalated) | Sweden | 5 |
