Ada Kok

Ada Kok is a Dutch former swimmer, born in Amsterdam on 6 June 1947, who ranked among the best butterfly swimmers in the world during the 1960s. She began her international career at fifteen, taking the 100 metre butterfly title at the 1962 European Championships in Leipzig and helping the Dutch medley relay to silver. At the 1964 Tokyo Olympics she finished second in both of her butterfly events, and at the 1966 European Championships in Utrecht she won the 100 metre butterfly and the 4x100 metre relay while taking second in the 400 metres freestyle. Between 1963 and 1967 she set nine world records in the butterfly. Her peak came at the 1968 Summer Olympics in Mexico City, where she won the 200 metre butterfly in 2:24.7, beating East German Helga Lindner by one tenth of a second after a disappointing fourth place in the 100 metre race.