Goffar the Pict

There a battle was fought against troops given to Goffar by the eleven other kings of Gaul, and won, founding the city of Tours named in honor of Brutus' nephew Turnus, who died fighting.

[3] Geoffrey's main source, the Historia Brittonum, does not mention Goffar, but does contain a passage that he expanded into this story: "[Brutus] was exiled on account of the death of Turnus, slain by Aeneas.

[4] However, academic Hans Matter suggested that Geoffrey could have taken the etymological origin story of Tours, and expanded it using traditions about the historical Waiofar of Aquitaine, who is called "Guaifier" in the Chanson de Roland.

[5][6] Wace's Roman de Brut (1155) expands on Monmouth's Historia Regum Britanniae, and includes Goffar (also variously spelled Gofar, Gossac, and Gofiers) as the king of Poitiers.

It follows the story of Historia Regum Britanniae and Roman de Brut, but has Corineus deny the righteousness of the king's frith (both "peace" and law) which emerges as a form of subjegation instead of protection, and also recasts the killing of Numbert in terms of personal honour and retribution.

[12] John Rastell's The Pastyme of People (1529) mentions Goffar (under the name "Copharius") as a prince of "Gallia now callyd Guian" (Guyenne), as part of a very condensed version of the Brutus story.

[16] Alain Bouchart [fr] drew on Monmouth's Historia Regum Britanniae for the early part of his 1514 history of Brittany Les Grandes Croniques de Bretaigne.

It follows the story of Monmouth's Historia Regum Britanniae, which the author cites as the source for Goffar, along with La Mer des histoires [fr] and an anonymously written Chronicle from the library of Saint Denis.