This king appears in Les Merveilles de Rigomer as an ally of Rigomer castle. Gawain defeated him during his battle to conquer the castle.
In Chrétien’s Erec, Erec unhorsed him, along with his saddle and the reins of his bridle, in a mighty clash at the tournament between Evroic and Tenebroc. He may have inspired Hartmann’s Roiderodes.
See also
Landunas | The Legend of King Arthur
Sources
Erec | Chrétien de Troyes, late 12th century