| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Juan Manuel•Alonso Allende y Allende |
| Used name | Juan Manuel•Alonso |
| Born | 8 December 1918 in Bilbao, Vizcaya (ESP) |
| Died | 10 March 1984 (aged 65 years 3 months 2 days) in Madrid, Madrid (ESP) |
| Measurements | 174 cm / 79 kg |
| Affiliations | Real Sporting Club, Getxo |
| NOC |  Spain |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1948 Summer Olympics | Sailing | ESP |
Juan Manuel Alonso | |||
| One-Person Dinghy, Open (Olympic) | 19 | |||||
| 1960 Summer Olympics | Sailing | ESP |
Juan Manuel Alonso | |||
| Two-Person Heavyweight Dinghy, Open (Olympic) | Gabriel Laiseca | 11 | ||||
| 1968 Summer Olympics | Sailing | ESP |
Juan Manuel Alonso | |||
| Two-Person Keelboat, Open (Olympic) | Juan Manuel Alonso-Allende | 18 |
