Theodore Gambrill was born 13 April 1854 in Windsor, New South Wales, Australia to William Gambrill (1821-1888) and Sarah Ransley (1827-1856) and died 5 April 1939 Morisset, New South Wales, Australia of unspecified causes. He married Angelina Sarah Woolcock (1862-1949) 28 August 1877 in Bingara, New South Wales, Australia.
Children
| Name | Birth | Death | Joined with |
| Darcy Bertrude Gambrill (1878-1958) | |||
| George Edgerton Gambrill (1881-1940) | |||
| Ruby Gwydir Gambrill (1883-1975) | |||
| Pearl Elinor Gambrill (1885-1893) | |||
| Arthur Wallace Theodore Gambrill (1887-1942) | |||
| Edwin Horace Gambrill (1891-1972) | |||
Footnotes (including sources)
| ‡ General |