William O'Brien, 3rd Earl of Inchiquin

William MacWilliam O'Brien, 8th Baron of Inchiquin, 3rd Baron O'Brien of Burren, 3rd Earl of Inchiquin PC (1662 – 24 December 1719) was an Irish nobleman.

William O'Brien, 3rd Earl of Inchiquin

Life

William O'Brien was the son of William O'Brien, 2nd Earl of Inchiquin and Lady Margaret Boyle. He married his cousin Mary Villiers, daughter of Sir Edward Villiers of Richmond and Frances Howard, the youngest daughter of Theophilus Howard, 2nd Earl of Suffolk and Elizabeth Hume.

Like his father, he was attainted in his absence by the Irish Parliament of King James II in 1689. He was Governor of Kinsale in 1693. He signed the declaration and association in defence of King William III after the assassination attempt against the King in 1697.

He was Privy Councillor to Queen Anne and King George I, Colonel of Foot in 1703 and Mayor of Kilkenny from 1704 to 1705. He was made Governor of County Clare.

Family

Children of William O'Brien, 3rd Earl of Inchiquin and Mary Villiers:

  • Donal O'Brien, born 1689.
  • William O'Brien, 4th Earl of Inchiquin (1700 – 18 July 1777)
  • Mary O'Brien, who married Robert FitzGerald, 19th Earl of Kildare, son of Hon. Robert FitzGerald and Mary Clotworthy, on 7 March 1708/9. They had two sons and one daughter.
  • Charles O'Brien Lieut RN
  • James O'Brien (d. 17 December 1771) Married Mary Jephson, daughter of Very Revd William Jephson and Anne Barry. They had three sons and two daughters.
  • Henrietta O'Brien (d. 1730) Married Robert Sandford in August 1717. They had one daughter.

References
Peerage of Ireland
Preceded by
William O'Brien		 Earl of Inchiquin
1662–1719		 Succeeded by
William O'Brien


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