Gérard Blitz (1 August 1901 – 8 March 1979) was a Belgian Olympic swimmer and water polo player who competed at the 1920, 1924, 1928 and 1936 Olympics. He was the younger brother of Maurice Blitz, also a water polo player, and uncle of Gérard Blitz who founded Club Med in 1950.
Fritz Albert Erich "Ete" Rademacher (9 June 1901 – 2 April 1979) was a German breaststroke swimmer and water polo goalkeeper who competed at the 1928 and 1932 Olympics. In 1928 he was a member of the German water polo team that won the gold medal, he also won a silver medal in the 200 metres breaststroke. Four years later he won another silver medal with the German water polo team.