Nebulall
The seneschal of Lambale.
He first served King Amant, Arthur’s enemy, and then King Gosengos, Amant’s son.
Gosengos allied with Arthur, and Nabunal ended up serving in Arthur’s army in battles against the Saxons and the Romans.
See also
Tharmadaise | The Legend of King Arthur
Sources
Vulgate Merlin | 1220-1235
Le Livre d’Artus | Early 13th century