He was the third surviving son on
James Hamilton, 7th Earl of Abercorn and Anne Plumer. He married Elizabeth Onslow, daughter of
Lt.-Gen. Richard Onslow and Pooley Walton, and they had the following children • George Hamilton (d. 11 October 1782) • Anne Hamilton (6 October 1755 – 18 December 1795) • Mary Hamilton (b. 26 November 1756) • Harriot Hamilton (11 January 1760 – 15 March 1788) • Catherine Hamilton (b. 7 Jun 1763) • Elizabeth Hamilton (5 June 1765 – 1843), married
Glynn Wynn on 13 November 1793, without issue • Rachel Hamilton (b. 17 Oct 1766) • Jane Hamilton (26 Feb 1768 – 1831), married firstly on 9 August 1791
William Plumer who died in 1822, secondly in 1825 Richard Lewin who died in 1827, thirdly on 16 July 1828
Robert Ward who died in 1846 • Lady Cecil Hamilton (15 Mar 1770 – 19 Jun 1819), married
John Hamilton, 1st Marquess of Abercorn • Isabella Hamilton (28 Sep 1772 – 19 December 1852), married
Lord George Seymour ==Career==