| 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 (aged 71 years 5 months) in Miraflores, Lima | PER |
| Measurements | 175 cm / 80 kg | |
| NOC | Peru | PER |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1956 Summer Olympics | Shooting | PER |
Guillermo Cornejo | |||
| Rapid-Fire Pistol, Men (Olympic) | 17 | |||||
| 1960 Summer Olympics | Shooting | PER |
Guillermo Cornejo | |||
| Rapid-Fire Pistol, Men (Olympic) | 36 | |||||
| 1964 Summer Olympics | Shooting | PER |
Guillermo Cornejo | |||
| Rapid-Fire Pistol, Men (Olympic) | 34 |
