One of the supreme freestyle swimmers of her time, Latvian-born Ilsa Konrads was only 13 years old when she broke two world records (for 800m and 880yds) in January 1958. In the same New South Wales championships, her elder brother, John, who had been a reserve on the 1956 Melbourne Olympic team, also began his world record breaking spree. She went on to win Olympic silver and Commonwealth gold.

Via Sport Australia Hall of Fame.