Jannie van Eyck Vos
Johanna Jannie van EyckVos is a retired Dutch track and field athlete. She competed at the 1964 Summer Olympics in the 800 m event, but failed to reach the final despite setting a personal record. She started as a javelin thrower and won a national title in 1956, but then changed to middledistance running and won another title, in 1966, in the 800 m.
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Source: Wikipedia