John Grey Gorton was the second child of Alice Sinn and John Rose Gorton; his older sister Ruth was born in 1909. He had no birth certificate, but on official forms recorded his date of birth as 9 September 1911 and his place of birth as Wellington, New Zealand. His birth was registered in the state of Victoria as occurring on that date, but in the inner Melbourne suburb of Prahran. However, that document contained a number of inaccuracies – his name was given as "John Alga Gordon", his parents were recorded as husband and wife, his father's name was incorrect, and his sister was recorded as deceased. At some point, Gorton's father told him that he had actually been born in Wellington. There are no records of his birth in New Zealand, but his parents are known to have travelled there on several occasions. John Gorton apparently believed he was born in Wellington, listing the city as his place of birth on his RAAF enlistment papers.