Gorlois

[7] According to Historia Regum Britanniae, Gorlois was vassal of Ambrosius Aurelianus, whose arrival at the Battle of Kaerconan ensured the defeat of Hengist.

[8] In Wace's Roman de Brut, when Hengist's son Octa and his cousin Ossa rebel, Gorlois helps Uther defeat them at York.

[9] In the Brut Tysilio, a Welsh version of Geoffrey's work, Gorlois is the father of Cador, Duke of Cornwall, presumably by Igraine.

He consults his friend Ulfin who tells him that the lady can hardly look favorably on someone who makes war on her husband, and suggests the king seek advice from Merlin in gaining access to Tintagel.

The 11th/12th century Welsh text Culhwch and Olwen lists "Gormant son of Rica (Arthur's brother on his mother's side, his father the chief elder of Cornwall)".

[11] The 13th century Prose Merlin calls Ygerne's husband Hoel, Duke of Tintagell, with Ydiers as king of Cornwall.

[13] The Book of Baglan (1600–1607) calls him Gurleis, Goulisor, or Gwrleis, duke or prince of Cornwall, and husband of Eigyr; he is the father of Cador, and son of Sortogus, a direct male-line descendant of Maxentius, Dyfnwal Moelmud, Camber and Brutus of Troy.

Igraine and Gorlois in Władysław T. Benda 's illustration for Uther and Igraine by Warwick Deeping (1903). In much of modern Arthurian tradition (a prominent example is 1983's The Mists of Avalon ), he is portrayed as a jealous and abusive husband