Ermaleü
Gawaine’s cousin in Beaucilous. He is called the son of the king of Orkney.
The daughter of the king of Montabor promised him her love if he could defeat twenty knights in a row. After conquering nineteen, he faced Beaudous, Gawain’s son, and was defeated. Beaudous sent him to Arthur’s court as a prisoner.
Source
Beaudous | Robert de Blois, mid to late 13th century