The Earl of Inchiquin
|Spouse(s)||Lady Anne Hamilton|
|Father||William O'Brien, 3rd Earl of Inchiquin|
William McWilliam O'Brien, 4th Earl of Inchiquin, KB, PC(I) (1700 – 18 July 1777) was an Irish peer and Whig politician who sat in the House of Commons between 1722 and 1754.
O'Brien was the eldest son of William O'Brien, 3rd Earl of Inchiquin, and his wife, Mary (née Villiers), sister of the 1st Earl of Jersey, and inherited his father's titles in 1719.He founded the predecessor of the present day Royal Cork Yacht Club, the Water Club of the Cork Harbour, in 1720.
Inchiquin was Whig Member of Parliament for Windsor from 1722 to 1727, for Tamworth from 1727 to 1734, for Camelford from 1741 to 1747 and for Aylesbury from 1747 to 1754. In 1725, he had been appointed a Knight Companion of the Order of the Bath. From 1740 to 1741, he was Grand Master of the Premier Grand Lodge of England, Governor of County Clare from 1741 to 1777 and Custos Rotulorum of Clare from 1762 to 1767. From 1744 to 1751, he was a Lord of the Bedchamber to Frederick, Prince of Wales, and admitted to the Privy Council of Ireland in 1753.
On his death in 1777, without surviving male heirs, his titles passed to his nephew, Murrough O'Brien, who was later created Marquess of Thomond.
On 29 March 1720, he married his cousin, Lady Anne Hamilton, the eldest daughter and heiress of George Hamilton, 1st Earl of Orkney, and his wife Elizabeth (née Villiers). His wife became 2nd Countess of Orkney in her own right in 1737. They had five children:
He married, secondly, Mary Moore, daughter of Stephen Moore, 1st Viscount Mount Cashell and Alicia Colville, on 12 October 1761
Additionally, Inchiquin was feted by antiquarians and many of the works of Irish history produced at this time are dedicated to him; as an Anglican deriving his lineage from an old Gaelic family, he was a politique choice for those wishing to disseminate their work in Ascendancy Ireland and Hanoverian Britain.
Baron Inchiquin is one of the older titles in the Peerage of Ireland. It was one of two titles created on 1 July 1543 for Murrough O'Brien, Prince of Thomond, who was descended from the great high king Brian Boru. The grant of the English titles was conditional upon the abandonment of native titles, the adoption of English customs and laws, pledging of allegiance to the English crown, apostasy from the Catholic Church, and conversion to the Anglican Church. Murrough was made both Earl of Thomond in the Peerage of Ireland, with remainder to his nephew Donough O'Brien and Baron Inchiquin, with remainder to his male heirs.
Lieutenant-General James FitzGerald, 1st Duke of Leinster, PC (Ire), styled Lord Offaly until 1744 and known as The Earl of Kildare between 1744 and 1761 and as The Marquess of Kildare between 1761 and 1766, was an Irish nobleman, soldier and politician.
Elizabeth Hamilton, Countess of Orkney was an English courtier from the Villiers family and the reputed mistress of William III & II, King of England and Scotland, from 1680 until 1695. She was a lady-in-waiting to his wife and co-monarch, Queen Mary II.
Sir Murrough O'Brien, 10th Baron of Inchiquin, 5th Baron O'Brien of Burren, 1st Baron Thomond of Taplow, 5th Earl of Inchiquin, 1st Marquess of Thomond KP, PC (Ire), known from 1777 to 1800 as the 5th Earl of Inchiquin, was an Irish peer, soldier and politician.
Anne Douglas-Hamilton, 2nd Countess of Orkney was a Scottish noblewoman and the eldest daughter of Field Marshal George Hamilton, 1st Earl of Orkney, and his wife, the former Elizabeth Villiers.
Mary O'Brien, 3rd Countess of Orkney was the eldest daughter of Anne O'Brien, 2nd Countess of Orkney, and William O'Brien, 4th Earl of Inchiquin, and Countess of Orkney in her own right.
Earl of Thomond was an hereditary title in the Peerage of Ireland. It was created twice for the O'Brien dynasty which was an ancient Irish sept native to north Munster.
Sir Conyers Darcy or Darcey,, of Aske, near Richmond, Yorkshire, was a British Army officer, courtier and Whig politician who sat in the House of Commons between 1707 and 1758.
The Honourable Thomas Townshend, of Frognal House, Kent, was a British Whig politician who sat in the House of Commons for 52 years from 1722 to 1774.
Gentleman of the Bedchamber was a title in the royal household of the Kingdom of England from the 11th century, later used also in the Kingdom of Great Britain.
Sir Edward Villiers was an English politician and military officer from the powerful Villiers family.
William Ponsonby, 2nd Earl of Bessborough was a British politician and public servant. He was an Irish and English peer and member of the House of Lords. He served in both the Irish and the British House of Commons, before entering the House of Lords, and held office as a Lord Commissioner of the Admiralty, Lord Commissioner of the Treasury, and as Postmaster General of the United Kingdom. He was also a Privy Counsellor, Chief Secretary for Ireland and Earl of Bessborough.
William James Conolly was an Anglo-Irish landowner and Whig politician who sat in the Irish House of Commons from 1727 to 1754 and in the British House of Commons from 1734 to 1754
Hon. James O'Brien was an Irish nobleman and politician.
John Monckton of Serlby, Nottinghamshire, was a British landowner and Whig politician who sat in the House of Commons between 1727 and 1751. He was elevated to the Irish peerage as the first Viscount Galway in 1727.
Henry Moore, 4th Earl of Drogheda, styled Viscount Moore from 21 May to 7 June 1714, was an Irish peer and rake who briefly served in the Parliament of Great Britain. He inherited his title and estates at the age of 13, when his father and grandfather died in quick succession. Drogheda rapidly became a debauchee, and after squandering large sums, died at the age of 26, leaving his younger brother a heavily encumbered estate.
Henry O'Brien, 8th Earl of Thomond was an Irish peer and Member of Parliament.
|Parliament of Great Britain|
Sir Henry Ashurst
| Member of Parliament for Windsor |
With: Earl of Burford 1722–1726
Lord Vere Beauclerk 1726–1727
Lord Vere Beauclerk
Hon. Francis Willoughby
Hon. George Compton
| Member of Parliament for Tamworth |
With: Thomas Willoughby
Lord John Sackville
Hon. George Compton
Sir Thomas Lyttelton
Hon. James Cholmondeley
| Member of Parliament for Camelford |
With: Charles Montagu
The Earl of Londonderry
Hon. William Stanhope
| Member of Parliament for Aylesbury |
With: Edward Willes
| Grand Master of the|
Premier Grand Lodge of England
The Lord Coleraine
|Peerage of Ireland|
| Earl of Inchiquin |