| Roles | Competed in Olympic Games | 
|---|---|
| Sex | Male | 
| Full name | Jacob "Jaap"•Knol | 
| Used name | Jaap•Knol | 
| Born | 1 December 1896 in Uitgeest, Noord-Holland (NED) | 
| Died | 8 October 1975 in Amsterdam, Noord-Holland (NED) | 
| Affiliations | APGS, Amsterdam (NED) | 
| NOC |   Netherlands | 
Personal Best: JT – 56.88 (1933).
| Games | Discipline (Sport) / Event | NOC / Team | Pos | Medal | As | |
|---|---|---|---|---|---|---|
| 1928 Summer Olympics | Athletics |  NED | 
Jaap Knol | |||
| Javelin Throw, Men (Olympic) | 25 r1/2 |