Paolo Francesco Radmilovic was a Welsh water polo player and competitive swimmer. Radmilovic had Croatian and Irish origins. He represented Great Britain at four editions of Summer Olympics. He won four Olympic titles in a 22-year Olympic career. He won four gold medals across three successive Olympic Games, a record which stood for a Great Britain Olympic athlete until broken by Sir Steve Redgrave when he won his fifth gold medal at Sydney in 2000. In 1928, he became the first person to compete for Britain at five Olympic Games, a record that would remain until surpassed by fencer Bill Hoskyns in 1976.
Harald Sigfrid Alexander Julin was a Swedish swimmer and water polo player who competed at the 1906, 1908, 1912 and 1920 Olympics. In 100 m freestyle swimming he won a bronze medal in 1908, and failed to reach the finals in 1906 and 1912; he finished fifth in the 4×250 m freestyle relay in 1906. In water polo he won bronze medals in 1908 and 1920 and a silver at the 1912 Summer Olympics in his native Stockholm. His sons Åke and Rolf also became Olympic water polo players.
Joseph Pletincx was a Belgian water polo player. He competed at the 1908, 1912, 1920, and 1924 Summer Olympics and won three silver and one bronze medals, becoming one of eight male athletes who won four or more Olympic medals in water polo.
René Bauwens was a Belgian freestyle swimmer and water polo player who competed in the 1920 and 1928 Summer Olympics.
Gunnar Erik Emanuel Wennerström was a Swedish water polo player and freestyle swimmer who competed in the 1908 Summer Olympics.
Harry Joseph Hebner was an American competition swimmer and water polo player who competed at the 1908, 1912 and 1920 Summer Olympics.
Perry McGillivray was an American competition swimmer and water polo player who represented the United States at the 1912 Summer Olympics and 1920 Summer Olympics.
Joachim ("Aki") Rademacher was a German water polo player who competed in the 1928 Summer Olympics and in the 1932 Summer Olympics. He was born in Magdeburg.
Joseph Aloysius Ruddy Sr. was an American competition swimmer and water polo player who represented the United States at the 1904 Summer Olympics in St. Louis, Missouri. Ruddy won a gold medal as a member of the winning U.S. team in the men's 4x50-yard freestyle relay. He won a second gold medal as a member of the first-place U.S. water polo team.
Sven "Sven-Pelle" Pettersson was a Swedish swimmer and water polo player who competed in the 1928 Summer Olympics and in the 1936 Summer Olympics.
Amedee Valle Reyburn, Jr. was an American freestyle swimmer and water polo player who competed in the 1904 Summer Olympics.
Otto Gösta Adolf Persson was a Swedish freestyle swimmer and water polo player who competed in the 1924 Summer Olympics and in the 1936 Summer Olympics.
Frances Cowells Schroth was an American competition swimmer, Olympic champion, and former world record-holder. She represented the United States at the 1920 Summer Olympics in Antwerp, Belgium. She won the gold medal as member of the first-place U.S. team in the 4×100-meter freestyle relay, together with Margaret Woodbridge, Irene Guest and Ethelda Bleibtrey. The American relay team set a new world record of 5:11.6 in the event final. Individually, she also won bronze medals for her third-place performances in the women's 100-meter freestyle (1:17.2) and the women's 300-meter freestyle (4:52.0).
Harold Edward Annison was an English competitive swimmer, water polo player, and Olympic medallist who represented Great Britain in international competition.
Edward Percival Peter was an English competitive swimmer and water polo player who represented Great Britain at the 1920, 1924 and 1928 Summer Olympics.
James Wallace O'Connor was an American competition swimmer and water polo player who played internationally for the United States at four Olympiads: at the 1924, 1928, 1932 and 1936.
William Jeremiah Tuttle was an American freestyle swimmer and water polo player who represented the United States at the 1904 Summer Olympics in St. Louis, Missouri. He was born in Chicago, Illinois, and died in Los Angeles, California.
Federico "Fritz" Dennerlein was an Italian freestyle and butterfly swimmer and water polo player who competed in the 1956, 1960 and 1964 Summer Olympics. He finished fourth in the water polo tournaments in 1956 and 1964, and in the 200 m butterfly event in 1960. He also reached the finals of the 4 × 200 m freestyle (1956) and 4 × 100 m medley (1960) relays.
Albert Mayaud was a French water polo player and freestyle swimmer who competed at the 1920 and 1924 Summer Olympics.
Jean-Pierre Vermetten was a Belgian freestyle swimmer and water polo player who competed in the 1920 Summer Olympics and in the 1924 Summer Olympics.
