A knight who tried to force a lady to marry him against her will. She requested, and received, a champion from Arthur’s court.
Miraudiaus fell ill because he was terrified of Gawain, whom he assumed Arthur would appoint. Gawain, ignorant of the circumstances, showed up at Miraudiaus’s castle looking for lodging. Miraudiaus imprisoned him. He then headed to Arthur’s court for the duel. When he discovered that his opponent was to be Lancelot, he immediately surrendered and freed Gawain.
Arthur appointed him to the Round Table.
Source
Les Merveilles de Rigomer | Jehan, mid to late 13th century