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.
Unified Cornish Unified Cornish (UC) ("Kernewek Uny[e]s", "KU") is a variety of the Cornish language of the Cornish revival. Developed gradually by Robert Morton Nance during and before the 1930s, it derived its name from its standardisation of the variant spellings of traditional Cornish MSS. Nance's recommended spelling and grammar, based on Middle Cornish, soon supplanted Henry Jenner's system, which had been based largely on Late Cornish. Most of the older generation of Cornish users alive today would have started under this system. It was also the form originally used by Gorsedh Kernow, although they now use the new Standard Written Form.