Belinor, Bellynor, Bely, Belyor

When Lancelot and his followers left Arthur, Sir Bors' seat at the Round Table was given to Bellinor.

Sir Bellinor was a king's son, but which king is unknown, although the Vulgate says "le fiex au roi des Estraignes Illes", which makes me think he is the son of the King of the Strange Islands.