Family and Education
b. c. 1700, 1st s. of William O’Brien, 3rd Earl of Inchiquin [I], by Mary, da. of Sir Edward Villiers, knight-marshal, sis. of Edward Villiers, 1st Earl of Jersey. m. (1) 28 Mar. 1720, his 1st cos. Lady Anne Hamilton (d. 6 Dec. 1756), da. and h. of George Hamilton, 1st Earl of Orkney [S], and suo jure Countess of Orkney, 4s. 4da.; (2) 12 Oct. 1761, Mary, da. of Stephen Moore, 1st Visct. Mount Cashell [I], s.p. suc. fa. 24 Dec. 1719; K.B. 28 May 1725.
Offices Held
Grand master of freemasons 1740 – 41; gov. co. Clare 1741 and custos rot. 1762 – d.; gent. of the bedchamber to Frederick, Prince of Wales Dec. 1744–51; P.C. [I] 15 Nov. 1753.
Parlimentarian
Volume
Commons 1715-1754
Web Title
O'BRIEN, William (c.1700-77)
Will
Estates
Oxford 1644
No
Addresses
Religion
Image