Goneweys, Gonfal, Gonwais, Gunfasius, Gunphar
King of the Orkneys who chose to voluntarily subjugate himself to Arthur rather than have Arthur conquer him. Arthur left him at his post.
He later assisted Arthur in the conquest of King Frollo and Gaul.
Source
Historia Regum Britanniae | Geoffrey of Monmouth, c. 1138
Roman de Brut | Wace, c. 1155
Brut | Layamon, late 12th century to mid-13th century