Sophia Lansdowne was born 1886 in Merriwa, New South Wales, Australia to Frederick Thomas Lansdown (1849-1910) and Maria Gosper (1844-1910) and died 1963 Inverell, New South Wales, Australia of unspecified causes.
Children
| Name | Birth | Death | Joined with |
| Vivien Henry Mitchell (1907-1984) | |||
| Ronald Vernon J Mitchell (1909-1912) | |||
| Clifford James Mitchell (1910-1965) | |||
| Royal Edwin Mitchell (1912-1941) | |||
| Eva May Mitchell (1914-) | 23 May 1914 Merriwa, New South Wales, Australia | Hillis Ambrose Gainey (1908-1978) | |
| Muriel Victoria Mitchell (1916-1972) | 10 March 1916 Merriwa, New South Wales, Australia | 27 March 1972 Inverell, New South Wales, Australia | Dallace Humphrey Gainey (1912-1982) Reginald Ernest Gearing (1911-1980) |