| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Willem Tell "William"•Pietersz | |
| Used name | William•Pietersz | |
| Born | 18 February 1925 in Barranquilla, Atlántico |  COL |
| Died | 24 October 1992 (aged 67 years 8 months 6 days) in Barranquilla, Atlántico | COL |
| NOC | Colombia | COL |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1956 Summer Olympics | Shooting | COL |
William Pietersz | |||
| Trap, Men (Olympic) | 22 |
