... and Arthur called the attendants, who guarded his couch.  And these were four pages, whose names were Cadyrnerth the son of Porthawr Gandwy, and Ambreu the son of Bedwor, and Amhar the son of Arthur, and Goreu the son of Custennin...
    ... Then Kilhwch set forward, and Goreu the son of Custennin with him, and as many as wished ill to Yspaddaden Penkawr.  And they took the marvels with them to his court.  And Kaw of North Britain came and shaved his beard, skin, and flesh clean off to the very bone from ear to ear.  "Art thou shaved, man?" said Kilhwch.  "I am shaved," answered he.  "Is thy daughter mine now?"  "She is thine," said he, "but therefore needest thou not thank me, but Arthur who hath accomplished this for thee.  By my free will thou shouldest never have had her, for with her I lose my life."  Then Goreu the son of Custennin seized him by the hair of his head, and dragged him after him to the keep, and cut off his head and placed it on a stake on the citadel.  Then they took possession of his castle, and of his treasures. (Mabinogion, Guest, 1910)