Full name: Wilhelm Fredrik Effern
Gender: Male
Born: January 21, 1907 in Vlaardingen, Zuid-Holland, Netherlands
Died: May 28, 1990 in IJmuiden, Noord-Holland, Netherlands
Affiliations: AV Haarlem, Haarlem (NED)
Country:
Netherlands
Sport: Athletics
Personal Best: 1500 – unknown. |
| Games | Age | City | Sport | Event | Team | NOC | Rank | Medal | |
|---|---|---|---|---|---|---|---|---|---|
| 1928 Summer | 21 | Amsterdam | Athletics | Men's 1,500 metres | Netherlands | NED | 7 h6 r1/2 |
| Games | Age | City | Sport | Country | Phase | Unit | Rank | |
|---|---|---|---|---|---|---|---|---|
| 1928 Summer | 21 | Amsterdam | Athletics | Netherlands | Round One | Heat Six | 7 |