Jan van de Graaff
Jan van de Graaff is a retired Dutch rower. He won the world title in the coxed pair at the 1966 World Rowing Championships and a bronze medal in the coxed fours at the 1964 Summer Olympics. At the 1964 Olympics his team mates were Marius Klumperbeek, Lex Mullink, Bobbie [van de Graaf] and Freek [van de Graaff]. The three "van de Graafs" were all born in 1944.