Adelaïde Henriette "Ada" den Haan (14 May 1941 – 17 March 2023) was a Dutch breaststroke swimmer. She dominated the 200m breaststroke event in the 1950s, setting four world records in 1956–1957, one under the old rules and three under the new rules that disallowed long underwater swimming. However, she could not participate in the 1956 Summer Olympics that were boycotted by the Netherlands in protest of the suppression of the Hungarian Revolution by the

Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...

. She won two European gold medals in 1958, but by 1959 her world record was broken and her dominance faded away. At the

1960 Summer Olympics The 1960 Summer Olympics ( it, Giochi Olimpici estivi del 1960), officially known as the Games of the XVII Olympiad ( it, Giochi della XVII Olimpiade) and commonly known as Rome 1960 ( it, Roma 1960), were an international multi-sport event held ...

she was part of the Dutch medley team that broke the Olympic record in the preliminaries; however, they finished fourth in the final. She was also fourth in the individual 200 m breastroke event. She married Martien Swinkels, the coach of the Dutch swimming star Marcel Wouda. Den Haan died on 17 March 2023, at the age of 81.

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* * 1941 births 2023 deaths Olympic swimmers of the Netherlands Swimmers at the 1960 Summer Olympics World record setters in swimming Dutch female freestyle swimmers Dutch female breaststroke swimmers Sportspeople from Eindhoven European Aquatics Championships medalists in swimming {{Netherlands-Olympic-medalist-stub