William O'Brien, 3rd Earl of InchiquinMary, née Villiers, daughter of Sir Edward Villiers, and sister of the 1st Earl of Jersey, married William, 3rd Earl of Inchiquin. On her wedding Queen Mary, to whom she had been a Maid of Honour, provided a wedding supper at Kensington Palace in London, plus £4,000 in cash and £1,000 in clothing and jewellery.
William O'Brien, 3rd Baron O'Brien of Burren, 8th Baron & 3rd Earl of InchiquinPC (1662 – 24 December 1719) was an Irish nobleman.
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 (Daniel) O'Brien, born 1689. Settled in Co. Waterford where he married Sarah Harrigan. Their sons were James O'Brien (d. 1800) and Andrew O'Brien (d. 1798)
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.
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