Biography
Mary Ann Douglass was born 10 June 1836 in Portland Head, New South Wales, Australia to William Douglass (1809-1877) and Jane Wright (1817-1898) and died 2 January 1926 Woy Woy, New South Wales, Australia of unspecified causes. She married John Thomas Singleton (1822-1874) 5 December 1853 in Gosford, New South Wales, Australia.
Children
| Name | Birth | Death | Joined with |
| Mary Jane Singleton (1855-1955) | |||
| James William Singleton (1857-1927) | |||
| John Thomas Singleton (1859-1949) | 1 October 1859 Gosford, New South Wales, Australia | 7 August 1949 Gosford, New South Wales, Australia | Charlotte Ann Elizabeth Douglass (1857-1915) |
| Sarah Ann Singleton (1861-1955) | 10 November 1861 Lower Hawkesbury, New South Wales, Australia | 13 December 1957 | Caleb Douglass (1857-1945) |
| Hedley Arthur Singleton (1864-1947) | 7 February 1864 Lower Hawkesbury, New South Wales, Australia | 26 November 1947 Davistown, New South Wales, Australia | Mary Jane Watkins (1867-1897) Emma Gertrude Watkins (1881-1961) |
| Joshua George Singleton (1866-1926) | |||
| Fairlena Miriam Singleton (1869-1926) | |||
| Henry Joseph Singleton (1871-1961) | |||
Footnotes (including sources)
| ‡ General |