Hilton Gainey was born 22 March 1882 in Carroll, New South Wales, Australia to Ambrose Hilton Vivian Gainey (1851-1923) and Annie Susan Griffin (1862-1936) and died 30 April 1927 Warialda, New South Wales, Australia of unspecified causes. He married Elizabeth Agnes Jane Gilligan (1883-1935) 9 November 1904 in Tingha, New South Wales, Australia.
Children
| Name | Birth | Death | Joined with |
| Hilton William Ambrose Gainey (1905-1976) | |||
| Annie Agnes Gainey (1907-1964) | |||
| Sydney Herbert Gainey (1909-1915) | |||
| Dallace Humphrey Gainey (1912-1982) | 1912 Moree, New South Wales, Australia | Muriel Victoria Mitchell (1916-1972) Bertha Ann Doris Darby (1911-) | |
| Zelda Minnie Gainey (1914-1915) | |||
| Lyra Mavis Gainey (1917-1998) | |||
| Muriel Mary Gainey (1919-2004) | |||
| Doris Naomi Gainey (1923-) | |||