Gaheris

Gaheris ( ) is a Knight of the Round Table and a relative of King Arthur in Thomas Malory's Arthurian legend compilation ''Le Morte d'Arthur''. He is the third son of one of Arthur's half-sisters, Queen Morgause, and her husband King Lot of Orkney. Gaheris is a younger brother of Gawain and Agravain, an elder brother of Gareth, and a half-brother of Mordred.

Malory's characters of Gaheris and Gareth both originate from the figure of Gawain's sole brother from the early Welsh Arthurian tradition. In the later French chivalric romances and their adaptations, this character was variably divided into two separate but often more or less interchangeable brothers, known as Gaheriet and Guerrehet among many other forms spellings, and the differences between them have been highly inconsistent prior to Malory's creation of a distinctive younger Gareth. In German medieval poetry, where no equivalent of Gareth exists, a corresponding sole character appears as Gawain's cousin rather than his brother.