Sir Kahedin (variantly spelled Kahadin, Kahedrin, Kehenis, Kehidius; possibly the
Welsh character Kae Hir) is brother to Iseult of Brittany and the son of King
Hoel of Brittany in
Arthurian legend. The story of his affair with
Brangaine, the handmaiden of Iseult of Ireland is significantly mentioned in the
Tristan and Iseult legend.