Over the centuries, the history of Owain known to storytellers faded sufficiently that he was incorporated into Welsh Arthurian legend and stories about him spread to continental Europe. Chrétien's "Yvain, the Knight of the Lion" and the related Mabinogion story "Owain, or the Lady of the Fountain" are devoted to his exploits, and he appears prominently in the Mabinogion tale "The Dream of Rhonabwy" and briefly in Geoffrey of Monmouth's "Historia Regum Britanniae". The character is portrayed as an excellent knight in the later romances, the Lancelot-Grail cycle and Sir Thomas Malory's "Le Morte d'Arthur", under one spelling of his name or another.