Three entries with the name Nabor.
Nabor
An old knight in Nascien’s service.
Flegentine sent him to find her husband, Nascien. He finds Nascien fighting the giant Pharein (Faran). He betrayed his lord and nearly killed him, but Nascien prayed, and God struck Nabor dead.
See also
Karrabel | The Legend of King Arthur
Towers of Judgement | The Legend of King Arthur
Nabor
The son of King Nascor and brother of Aglinda.
The devil tricked Nabor into believing that Aglinda was not his real sister, and made Nabor want to rape Aglinda. When he attempted to do so by a spring, Aglinda prayed and Nabor fell dead. In memory of the episode, the spring was called the Spring of the Virgin, and it was enchanted to paralyze visiting non-virginal knights.
Source
Post-Vulgate Queste del Saint Graal | 1230-1240
Nabor
A knight defeated in combat by Claris and Laris. Claris and Laris were helping Sir Caradoc protect his paramour from King Ladas, Sir Nabor’s liege.
Source
Claris et Laris | 1268