Full name: Marianne Yvonne Heemskerk (-Oudkerk-)
Gender: Female
Height: 5'0" (152 cm)
Weight: 121 lbs (55 kg)
Born: August 28, 1944 in Rotterdam, Zuid-Holland, Netherlands
Affiliations: ZV Naarden, Naarden (NED)
Country:
Netherlands
Sport: Swimming
Related Olympians: Wife (divorced) of Jaap Oudkerk.
Medals: 1 Silver (1 Total)
| Games | Age | City | Sport | Event | Team | NOC | Rank | Medal | |
|---|---|---|---|---|---|---|---|---|---|
| 1960 Summer | 15 | Roma | Swimming | Women's 100 metres Butterfly | Netherlands | NED | 2 | Silver | |
| 1960 Summer | 15 | Roma | Swimming | Women's 4 × 100 metres Medley Relay | Netherlands | NED | 4 | ||
| 1964 Summer | 20 | Tokyo | Swimming | Women's 400 metres Individual Medley | Netherlands | NED | 2 h4 r1/2 |
| Games | Age | City | Sport | Country | Phase | Unit | Rank | T | |
|---|---|---|---|---|---|---|---|---|---|
| 1960 Summer | 15 | Roma | Swimming | Netherlands | Final | 2 | 1:10.4 | ||
| 1960 Summer | 15 | Roma | Swimming | Netherlands | Round One | Heat Four | 1 | QU | 1:11.0 |
| Games | Age | City | Sport | Country | Phase | Unit | Rank | T | |
|---|---|---|---|---|---|---|---|---|---|
| 1964 Summer | 20 | Tokyo | Swimming | Netherlands | Round One | Heat Four | 2 | 5:38.6 |
| Games | Age | City | Sport | Team | NOC | Phase | Unit | Rank | T | IST | CTAS | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1960 Summer | 15 | Roma | Swimming | Netherlands | NED | Final | 4 | 4:47.6 | 1:10.9 | 3:44.9 |