| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Guillermo Pedro•Cornejo Calderón |
| Used name | Guillermo•Cornejo |
| Born | 25 June 1919 in Arequipa, Arequipa (PER) |
| Died | 25 November 1990 in Lima, Lima (PER) |
| Measurements | 175 cm / 80 kg |
| NOC | Peru |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1956 Summer Olympics | Shooting | PER |
Guillermo Cornejo | |||
| Rapid-Fire Pistol, 25 metres, Men (Olympic) | 17 | |||||
| 1960 Summer Olympics | Shooting | PER |
Guillermo Cornejo | |||
| Rapid-Fire Pistol, 25 metres, Men (Olympic) | 36 | |||||
| 1964 Summer Olympics | Shooting | PER |
Guillermo Cornejo | |||
| Rapid-Fire Pistol, 25 metres, Men (Olympic) | 34 |