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.
Old Norman Old Norman, also called Old Northern French or Old Norman French, was one of many "langues d'oïl" (Old French) dialects. It was spoken throughout the region of what is now called Normandy and spread into England, Southern Italy, Sicily and the Levant. It is the ancestor of modern Norman, including the insular dialects (such as Jèrriais), as well as Anglo-Norman.