| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Guillaume Élie Désiré Fidèle•Séron | |
| Used name | Guillaume•Séron | |
| Born | 19 April 1877 in Ixelles, Région de Bruxelles-Capitale |  BEL |
| Affiliations | Royal Brussels SC — Bruxelles (Brussels), Région de Bruxelles-Capitale | BEL |
| NOC | Belgium | BEL |
| Medals | OG |
| Gold | 0 |
| Silver | 1 |
| Bronze | 0 |
| Total | 1 |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1900 Summer Olympics | Water Polo (Aquatics) | BEL |
Guillaume Séron | |||
| Water Polo, Men (Olympic) | Brussels Swimming and Water Polo Club | 2 | Silver |
