Zelotés
An evil king who had been promised the maiden Perse by her father.
When Perse refused to marry Zelotés, he abducted her. Hector of the Fens (Ector de Maris), who loved Perse, went to Zelotés’s castle, killed him in combat, and freed Perse.
Source
Vulgate Lancelot | 1215-1230