William Stewart, 1st Earl of Blessington

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File:Henrietta Street - Dublin 4891466188.jpg
Entrance to Mountjoy's town house
12 Henrietta Street Dublin August 2010

William Stewart, 1st Earl of Blessington (7 April 1709 – 14 August 1769)[1] was an Anglo-Irish peer and member of the House of Lords, styled The Honourable William Stewart until 1728 and known as The Viscount Mountjoy from 1728 to 1745.

Stewart was the son of William Stewart, 2nd Viscount Mountjoy and Anne Boyle. He married Eleanor Fitzgerald, daughter of Robert Fitzgerald on 10 January 1733. They had two children, William Stewart and Lionel Robert, both of whom died before their father.

He succeeded his father as Viscount Mountjoy on 10 January 1727. He was Grand Master of the Freemasons (in Ireland) between 1738 and 1740. He was created Earl of Blessington on 7 December 1745, his mother having been sister and sole heiress of Charles, 2nd and last Viscount Blesington.[2] He was made Governor of County Tyrone and in 1748, was sworn of the Privy Council of Ireland.

On his death in London on 14 August 1769 he was buried at Silchester in Hampshire. His peerages became extinct, but his baronetcy was inherited by a distant cousin, Sir Annesley Stewart.


  1. http://www.leighrayment.com/peers/peersB3.htm
  2. Public Domain One or more of the preceding sentences incorporates text from a publication now in the public domainChisholm, Hugh, ed. (1911). "Mountjoy, Barons and Viscounts". Encyclopædia Britannica. 18 (11th ed.). Cambridge University Press. p. 941.CS1 maint: ref=harv (link)<templatestyles src="Module:Citation/CS1/styles.css"></templatestyles> s.v. "William, 3rd Viscount Mountjoy"
Peerage of Ireland
New creation Earl of Blessington
Preceded by
William Stewart
Viscount Mountjoy
Baronetage of Ireland
Preceded by
William Stewart
(of Ramelton)
Succeeded by
Annesley Stewart
Masonic offices
Preceded by
William Vaughan
Grand Master of the
Antient Grand Lodge of England

Succeeded by
The Earl of Kellie