Gollerothirame
In the Middle English Sir Perceval of Galles, a Saracen Sultan who besieged the Lady Lufamour in Maidenland, intending to force her into marriage. Perceval challenged, fought, and killed him. One of his brothers, a giant, tried to avenge his death and failed.
The same character is known as Clamadeu in Chrétien’s Perceval.
Source
Sir Perceval of Galles | Early 14th century