Thomas George Stacpoole Mahon 573
- Born: 11 July 1848
- Marriage: Geraldine Mary O'Brien on 8 June 1886 in Kilnasoolagh, County Clare
- Died: 10 October 1906, Corbally, County Clare aged 58
- Buried: 1906, Kilnasoolagh, County Clare
Of Corbally, County Clare. Educated at Harrow and at Trinity College, Oxford. Matriculated 12 October 1867; B.A. 1871. Of the Inner Temple, called to the Bar, 17 November 1873. J.P. and D.L. and Vice-Lieutenant for County Clare. High Sheriff 1880.
Thomas married Geraldine Mary O'Brien, daughter of Edward Donough O'Brien, 14th Baron Inchiquin and Emily Holmes à Court, on 8 June 1886 in Kilnasoolagh, County Clare. (Geraldine Mary O'Brien was born on 16 June 1863 in Upham, Hampshire and died on 3 February 1951 in Gloucester 13.)