What Brittonic dialect was spoken in the kingdom who had the father of Owain mab Urien as king?
Owain mab Urien Owain mab Urien (or Owein) (died c. 595) was the son of Urien, king of Rheged c. 590, and fought with his father against the Angles of Bernicia. The historical figure of Owain became incorporated into the Arthurian cycle of legends where he is also known as Ywain, Yvain, Ewain or Uwain. In his legendary guise he is the main character in Chrétien de Troyes's "Yvain, the Knight of the Lion" and the Welsh Romance "Owain, or the Lady of the Fountain", which corresponds to Chrétien's poem.
History of Gwynedd during the High Middle Ages The history of Gwynedd in the High Middle Ages is a period in the History of Wales spanning the 11th through the 13th centuries. Gwynedd, located in the north of Wales, eventually became the most dominant of Welsh principalities during this period. Distinctive achievements in Gwynedd include further development of Medieval Welsh literature, particularly poets known as the "Beirdd y Tywysogion" (Welsh for "Poets of the Princes") associated with the court of Gwynedd; the reformation of bardic schools; and the continued development of "Cyfraith Hywel" ("The Law of Hywel", or "Welsh law"). All three of these further contributed to the development of a Welsh national identity in the face of Anglo-Norman .