John Martin Heagney was born 9 May 1851 in Whittingham, New South Wales, Australia to Martin Heagney (1811-1891) and Jane Pearson (1822-1903) and died 29 May 1913 Pinch Flat, New South Wales, Australia of unspecified causes. He married Catherine Handebo (1850-1939) 22 January 1873 in 'Spring Gully', Armidale, New South Wales, Australia.
Children
| Name | Birth | Death | Joined with |
| Sarah Jane Heagney (1874-1950) | |||
| Martin Heagney (1876-1928) | |||
| Henry Heagney (1877-1957) | |||
| Charles Edward Heagney (1879-1963) | |||
| Catherine Matilda Heagney (1881-1935) | 25 November 1881 Armidale, New South Wales, Australia | 19 June 1935 Waratah, New South Wales, Australia | James Augustus Partridge (1888-1954) |
| John Heagney (1884-1970) | |||
| William Richard Heagney (1885-1895) | |||
| Annie Isobel Heagney (1888-1977) | |||
| Samuel Herbert Heagney (1893-1980) | |||
Footnotes (including sources)
| ‡ General |