Baron of Hendwr, in the County of Merioneth, is a dormant title in the English Baronage which was created on 22 July 1284 for 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.

[1] Dafydd and his cousins were great grandchildren of Madog ap Maredudd, King of Powys, and had fought against Edward I during his Conquest of Wales.

[3] The 2nd 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.

[4] The daughter of the 3rd Baron, Gwerful ferch Madog, was the wife of Goronwy ap Tudur, and therefore 3rd great-grandmother of King Henry VII.

For the later history of the barony and the 19th century court case see Giwn Lloyd.