Hennie Penterman
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Hendrika ("Hennie") Penterman (born September 29, 1951 in Amsterdam, Noord-Holland) is a former medley swimmer from the Netherlands, who competed for her native country at two consequentive Summer Olympics, starting in 1968 in Mexico City, Mexico. There she was eliminated in the qualifying heats of the 200m and 400m Individual Medley. Four years later in Munich, West Germany, the same happened for Penterman in both her events.