For 10 points, name this uncouth son of Sir Ector, the foster brother and seneschal to King Arthur.
In one appearance, he adopts the twenty-fourth son of the shepherd Custennin, a boy named Goreu. He slew nine witches atop Ystarfingun and defeated a child of Hen Wen that terrorized Anglesey. In Lancelot, the Knight of the Cart, this knight is the first to challenge Meleagant, who defeats him. However, this knight successfully slays Wrnach the Giant and (*) Palug's Cat. This first knight to come to Culhwch's assistance put Gareth to work as a kitchen boy and gave him the ironic nickname "Beaumains". Malory describes how he forgot his sword while riding to his first tournament, leading his squire to pull a sword from a stone while searching for a replacement. For 10 points, name this uncouth son of Sir Ector, the foster brother and seneschal to King Arthur.
In one appearance, he adopts the twenty-fourth son of the shepherd Custennin, a boy named Goreu.
Sir Kay [or Cai or Cei or Kex or Keu or, delightfully, Queux]