Pasgen, King of Buellt & Gwerthrynion
Pasgen was the third son of the British High-King, Vortigern Vorteneu (the Thin). Though their father was deposed, Pasgen along with other members of his family, reached an agreement with the new ruler of Britain, Ambrosius Aurelianus, whereby they were able to retain the major part of their family’s lands. Pasgen was thus recognised as King of the Powysian mountains around Buellt and the little sub-kingdom of Gwerthrynion, named after his father. Legend adds that he later rebelled against Ambrosius, however, and twice attempted to overrun the island with help from the Saxons and the Irish. Pasgen was eventually killed by Uthyr Pendragon at the Battle of Mynyw (St. Davids). Despite this insurrection, his son was allowed to retain his Kingdoms, probably establishing his capital at Caer-Beris, where he founded a dynasty that lasted well into the 8th century.