Paolo Francesco Radmilovic (5 March 1886 – 29 September 1968) was a Welsh water polo player and competitive swimmer. He has Croatian and Irish origin who 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 was the first person to compete for Britain at five Olympic Games, a record that would remain until surpassed by fencer Bill Hoskyns in 1976.