A knight who loved the maiden of the Castle of the Door. When she refused to marry him, he besieged the the castle. He eventually abandoned the siege, after arranging with the Lord of the Castle of the Door that if the maiden could not find a champion within a year, Gernemant would take her by force and give her to his vilest stable boys. Just before the end of the year, Gawain visited the Castle of the Door and agreed to champion the maiden. Gawain killed Gernemant.