Arguisiaus of Carhaix, Arguissiaus
A knight who was defeated and wounded by a marauder named Dragonel the Cruel. Dragonel tried to force Arguisiaus’s paramour, Rohais, into marrying him.
Perceval arrived, rescued the maiden, and sent Arguisiaus to the castle of Belrepaire (Beaurepaire) for healing.
Source
Fourth Continuation of Chrétien’s Perceval | Gerbert de Montreuil, c. 1230