A knight who imprisoned Calogrenant (Calogrenat).
Sir Sagremor (Sagramore) battled him for Calogrenant’s release, and in the midst of the battle, another knight kidnapped Marlagan’s lady. Marlagan promised to free Calogrenant if Sagremor would rescue the lady, and Sagremor did so.
Source
Vulgate Lancelot | 1215-1230