Tristan Freitas Hegglun OBE ED (29 July 1915 – 22 July 1983) was a New Zealand rower, rugby union player, and local-body politician. He rowed for his country at the 1950 British Empire Games, and won two national rowing titles. A front-row forward and lock, he played provincial rugby for both Wellington and Marlborough, and was involved in services matches during World War II. He later served as a Blenheim borough councillor.