Baron of Cymmer-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 Mareduddking ofPowys. Owain Brogyntyn divided his lands equally between his three sons on his death, and his eldest son, Iorwerth, inherited lands centred on Cymmer, in the parish of Llangar and commote of Edeirnion. 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 English feudal barony, '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.
Gruffydd ab Iorwerth ab Owain Brogyntyn, 1st Baron of Kymmer-yn-Edeirnion
Llywelyn Ddu ap Dafydd, his brother, 4th Baron of Kymmer-yn-Edeirnion
Ieuan ap Llywelyn Ddu, his son,, 5th Baron of Kymmer-yn-Edeirnion
Rhys ab Ieuan, his son,, 6th Baron of Kymmer-yn-Edeirnion, ancestor of the Jones of Faerdref Uchaf family.
Dafydd ap Rhys, his son,, 7th Baron of Kymmer-yn-Edeirnion
Gruffydd Fychan ap Dafydd, his son, 8th Baron of Kymmer-yn-Edeirnion
William ap Gruffydd Fychan, his son, 9th Baron of Kymmer-yn-Edeirnion
Huw ap William, his son,, 10th Baron of Kymmer-yn-Edeirnion, who moved his residence from Plas Uchaf to Gwerclas. His pedigree and arms were confirmed at the visitations of Wales on 7 October 1594.
Humphrey Hughes, his son,, 11th Baron of Kymmer-yn-Edeirnion, who assumed, with his brother, the surname 'Hughes' and was High Sheriff of Merionethshire in 1618.
Hugh Hughes, his grandson, 14th Baron of Kymmer-yn-Edeirnion, and was High Sheriff of Merionethshire in 1720.
Daniel Hughes, his nephew, 15th Baron of Kymmer-yn-Edeirnion
John Hughes, his son, 16th Baron of Kymmer-yn-Edeirnion
William Hughes, his son, 17th Baron of Kymmer-yn-Edeirnion
William Hughes, his son, 18th Baron of Kymmer-yn-Edeirnion, a Captain in the Royal Horse Guards.
The Rev'd. William O'Farrell Hughes, his son, 19th Baron of Kymmer-yn-Edeirnion
The title is considered dormant as it is uncertain if any members of the Hughes of Gwerclas family survive to this day. Certainly descendants of the 6th Baron survive in the Jones of Faerdref Uchaf family. The barons have close links with Jesus College, Oxford and their escutcheon now hangs in the Hall.
