John James Monckton was an Australian backstroke swimmer who won a silver medal in the 100-metre event at the 1956 Summer Olympics in Melbourne. Although he set multiple world records, he never won an Olympic gold medal.

David Egmont Theile, AO is an Australian former backstroke swimmer of the 1950s and 1960s, who won consecutive gold medals in the 100-metre backstroke at the 1956 and 1960 Summer Olympics, the only Australian to do so. He subsequently became a leading surgeon and medical administrator.