| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Julien Jean Léon Mathieu•Van Muysen | |
| Used name | Julien•Van Muysen | |
| Born | 9 May 1890 in Anderlecht, Région de Bruxelles-Capitale |  BEL |
| Affiliations | BC Bruxelles — Bruxelles (Brussels), Région de Bruxelles-Capitale | BEL |
| NOC | Belgium | BEL |
Julien Van Muysen of Bruxelles (Brussels) was the Belgian amateur champion from 1912–14 and 1919–20 in lightweight boxing. He was defeated in the quarter-finals of the lightweight tournament at the 1920 Antwerpen (Antwerp) Olympics by Dick Beland of South Africa. Van Muysen was a member of Boxing Club de Bruxelles in 1920.
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1920 Summer Olympics | Boxing | BEL |
Julien Van Muysen | |||
| Lightweight, Men (Olympic) | =5 |
