Baron of Cymmer-yn-Edeirnion

Baron of Cymmer-yn-Edeirnion (or Kymmer-yn-Edeirnion), in the county of Merioneth, is a dormant title used by the senior male-line descendants of Owain Brogyntyn, youngest son of Madog ap Maredudd king of Powys. Owain Brogyntyn divided his lands equally between his three sons on his death, and his eldest son, Iorwerth, inherited lands centred on Cymmer (or Kymmer), in the parish of Llangar and commote of Edeirnion (part of Merionethshire). His son, Gruffydd ab Iorwerth, fought against Edward I during his invasion of Wales. After the Conquest of Wales, Gruffydd came "into the King's peace", and on 22 July 1284, had his lands confirmed by Edward I , 'just as his ancestors had held them', thereby creating him a baron in the English feudal baronage. The first surviving use of the title was by Gruffydd's grandson, Owain, who in 1334 was summoned to the sessions at Harlech as "Owenus ap Davidus," "Dominus de Kimmer." Some authorities, therefore, date the barons from Owain, whereas others begin with Gruffydd. In the fifteenth century their principal residence was known as Plas o Cymmer, and was later renamed Plas Uchaf. Later the 10th Baron moved to the nearby mansion of Gwerclas.
Titular Barons.
None of these titular barons have claimed the title Baron of Kymmer-yn-Edeirnion, they are simply the heirs to that title on the basis of primogeniture.