Baron of Hendwr, in the County of Merioneth, is a dormant title in the English Baronage which was granted on 22 July 1284 to Dafydd ap Gruffydd ap Owain Brogyntyn (a cousin of Gruffydd ap Iorwerth, 1st Baron of Kymmer-yn-Edeirnion) by letters patent issued by Edward I at Caenarfon. Dafydd and his kinsmen had fought against Edward I during his Conquest of Wales and, after coming into the King's Peace, received a Royal pardon and had their lands confirmed per Baroniam. The second Baron was summoned to Quo Warranto proceedings on 7 December 1334 at Harlech to assess by what authority he claimed his title and he cited the charter granted to his father in 1284. The daughter of the 3rd Baron, Gwerful ferch Madog was the wife of Goronwy ap Tudur, and therefore 3rd great-grandmother of King Henry