Fonds GB 0210 KEMNTE - Kemeys-Tynte Estate Papers,

David (alive 1436), third son of Jevan or John, third son of John ap Jevan Kemeys, married Cecil, daughter and heir of Llewelyn ap Evan ap Llewelyn ap Cynfrig of Cefnmabli. The Kemeys family of Cefnmabli descended from Lewis, their eldest son, while the Kemeys family of Faendre in Monmouthshire descended from Jenkin, the younger son. The Cefnmabli estate remained in the hands of the Kemeys family until the death, unmarried, of Charles Kemeys in 1735.
He was succeeded by his sister Jane who married the Rev. John Tynte (d. 1710), 2nd baronet, of Halswell in Somerset, and rector of Goathurst. They were succeeded in turn by their three sons, Halswell Tynte (1705-30), 3rd baronet, of Halswell and Cefnmabli, whose two daughters died young, Rev. John Tynte (1707-1740, d. unm.), 4th baronet and rector of Goathurst, and Charles Kemeys Tynte (1710-1785, dsp.), 5th baronet.
Charles was succeeded by his niece Jane Hassell (1738-1824), only surviving child of Charles's sister Jane Tynte (1708-41) and her husband (m. 1737) Ruishe Hassell (d. 1749), a major in the Royal Horse Guards. Jane Hassell married Col. John Johnson of Glaiston in Rutland and Burhill, Surrey, in 1765. On his wife's succession in 1785 he changed his name to John Johnson Kemeys-Tynte (d. 1795). They were succeeded by their son Colonel Charles Kemeys Kemeys-Tynte (b. 1788) of Halswell and Cefnmabli, who was succeeded by his son Charles John Kemeys-Tynte (b. 1800), Lieutenant-Colonel of the Glamorgan militia and MP for West Somerset 1832-1837 and Bridgwater 1847-1865. He married Elizabeth, daughter and coheir of Thomas Swinnerton of Butterton Hall, Staffordshire, in 1822, and was succeeded by his son Charles Kemeys-Tynte (b. 1822), colonel of the Somerset militia.
Cefn Mabli remained in the hands of the Kemeys Tynte family until 1923.