Thomas Peter McKellar was born 20 November 1853 in Windsor, New South Wales, Australia to Dougal McKellar Allott (1812-1901) and Caroline Newsome (1821-1882) and died 29 July 1934 New South Wales, Australia of unspecified causes. He married Jane Smallwood (1860-1896) 1880 in Windsor, New South Wales, Australia.
Children
| Name | Birth | Death | Joined with |
| Ernest W McKellar (1884-1973) | |||
| Elizabeth M McKellar (1885-c1887) | |||
| Thomas F McKellar (1887-1900) | |||
| Ida McKellar (1889-1959) | |||
| Emily Marjorie McKellar (1892-1972) | 1892 Windsor, New South Wales, Australia | 18 September 1972 Windsor, New South Wales, Australia | James Wilbow (1885-1960) |
| Frederick James McKellar (1894-1972) | |||
Footnotes (including sources)
| ‡ General |