O’BRIEN, Henry, 7th Earl of Thomond [I] (1688-1741), of Great Billing, Northants. and co. Clare

b. 14 Aug. 1688, o. s. of Henry Horatio O’Brien, Ld. O’Brien (3rd s. d.v.p. of Henry O’Brien, 6th Earl of Thomond [I]) by Lady Henrietta, da. of Henry Somerset†, 1st Duke of Beaufort, and sis. of Charles Somerset*, Mq. of Worcester. m. 14 June 1707, Lady Elizabeth (d. 1734), da. of Charles Seymour, 6th Duke of Somerset, s.p. suc. fa. 1690, gdfa. as 7th Earl of Thomond [I] 2 May 1691; cr. Visct. Tadcaster 19 Oct. 1714.