| Roles | Non-starter | |
|---|---|---|
| Sex | Male | |
| Full name | J.•Mathijsen | |
| Used name | J.•Mathijsen | |
| Affiliations | ABC Hercules — Amsterdam, Noord-Holland |  NED |
| NOC | Netherlands | NED |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1924 Summer Olympics | Boxing | NED |
J. Mathijsen | |||
| Lightweight, Men (Olympic) |
