Koos de Haas (10 September 1889 – 30 September 1966) was a Dutch

rower Rowing, sometimes called crew in the United States, is the sport of racing boats using oars. It differs from paddling sports in that rowing oars are attached to the boat using oarlocks, while paddles are not connected to the boat. Rowing is di ...

. He competed in the men's double sculls event at the

1920 Summer Olympics The 1920 Summer Olympics (french: Jeux olympiques d'été de 1920; nl, Olympische Zomerspelen van 1920; german: Olympische Sommerspiele 1920), officially known as the Games of the VII Olympiad (french: Jeux de la VIIe olympiade; nl, Spelen van ...

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* 1889 births 1966 deaths Dutch male rowers Olympic rowers for the Netherlands Rowers at the 1920 Summer Olympics Rowers from Amsterdam {{Netherlands-rowing-bio-stub