| Roles | Competed in Olympic Games |
|---|---|
| Sex | Male |
| Full name | Léoncé Eugene Ernest•Oleffe |
| Used name | Léoncé•Oleffe |
| Born | 25 August 1897 in Mont-Saint-Guibert, Brabant Wallon (BEL) |
| Died | 19 November 1972 in Woluwé-Saint-Pierre, Région de Bruxelles-Capitale (BEL) |
| NOC | Belgium |
Personal Bests: 800 – unknown; 1500 – unknown.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1920 Summer Olympics | Athletics | BEL |
Léoncé Oleffe | |||
| 800 metres, Men (Olympic) | 7 h2 r1/3 |