Sir ROGER MOSTYN ( 1734 - 1796 ), 5th bart. , was born 13 Nov. 1734 . He followed his father in the representation of the county in Parliament and continued to sit up to the time of his death. He also became lord lieutenant of the county and was one of the vice-presidents of the Welsh Charity School , London . The 5th baronet m. ( 12 May 1766 ) Margaret , daughter of the Rev. Hugh Wynn , of Bodysgallen and Berth-ddu , by his wife Catherine , sister of William Vaughan of Corsygedol, Mer. — see Vaughan of Corsygedol — and heiress of Robert Wynn , Bodysgallen . Among the issue of the marriage were (1) Elizabeth , who m., 11 Feb. 1794 , Sir Edward Pryce Lloyd , bart. of Pengwern , Flintshire , and Bodfach , Montgomeryshire , from whom the present baron Mostyn is descended, (2) Thomas Mostyn , the heir, and (3) Anna Maria , who became the wife ( 1802 ) of Sir Robert Williames Vaughan , bart. , of Nannau, Mer. (see Nannau family ).

Sir Roger also was interested in the literature and history of Wales ; Some Specimens of the Poetry of the Antient Welsh Bards by Evan Evans ( Ieuan Fardd , q.v.) is dedicated to him. He d. 26 July 1796