Ulesgalerons, Ylesgaleron, Yllesgalleron
His cousin, Guinganbresil, was an enemy of Gawain. When Illesgaleron did not show sufficient hatred for Gawain, Guinganbresil turned on him. His other cousins were Li Giromelans (Guiromelant), Greoreas le Rous and Brandeliz.
There is a twelfth-century non-Arthurian French romance called Illes et Galeron.
Le Livre d’Artus | Early 13th century