Her parents were Thomas UNDERWOOD and Sarah GATHE. They were married on 24 September 1792 at St. Pancras Old Church, London. The couple had four children children:
- Sophia Matilda born 23 December 1798
- Thomas Richard born 12 December 1801
- An Maria born 17 April 1804
- John James born 14 November 1806
Ann Maria married Thomas Griffiths at St. Pancras Old Church on 7 December 1831.
Ann Maria died at Bayview House, Tempe, NSW on 10 August 1873.
