| Roles | Competed in Olympic Games | |
|---|---|---|
| Sex | Male | |
| Full name | Jacobus Gerard "Ko"•Cornelissen | |
| Used name | Ko•Cornelissen | |
| Born | 29 January 1904 in Amsterdam, Noord-Holland |  NED |
| Died | 10 November 1954 (aged 50 years 9 months 12 days) in Amsterdam, Noord-Holland | NED |
| Affiliations | DOS — Amsterdam, Noord-Holland | NED |
| NOC | Netherlands | NED |
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1924 Summer Olympics | Boxing | NED |
Ko Cornelissen | |||
| Welterweight, Men (Olympic) | =9 |
Earlier listed incorrectly as Jan Cornelisse, also by Ton Bijkerk.
