Historicity of King Arthur in the mid-10th century and gives the date of Badon as 516, and it lists Arthur's death as occurring in 537 at the Battle of Camlann. The annals survive in a version dating from the 10th century, and all other sources that name Arthur were written at least 400 years after the events which they describe. Arthur was first styled as a king of the Britons in Geoffrey of Monmouth's chronicle "Historia Regum Britanniae" (c. 1136). Geoffrey also makes Ambrosius Aurelianus (whom he calls Aurelius Ambrosius) a king of Britain and an older brother of Uther Pendragon, father of Arthur,
The Winter King (novel) of Clyddno Eiddyn. Gorfyddyd is furious that Merlin might destroy his chance of becoming High King. He refuses Merlin's requests and readies his troops again for battle. Merlin, turning to Derfel, informs him that the Black Shield Irishmen currently allied to Gorfyddyd would switch sides and give Arthur victory. Sure enough, as battle resumes, the Black Shields attack Gorfyddyd and give the victory to Arthur. In the aftermath, Gorfyddyd is fatally wounded but uses his last breath to curse Arthur and declare Guinevere a whore. Cuneglas apologizes to Arthur for his father and swears an alliance will exist between Dumnonia