Upvote:3
John Block Friedman in The Monstrous Races in Medieval Art and Thought, Syracuse 2020, p.67 (via google books) treats it as a fictional name (in a league with stuff from the Alexander romance) and claims that Ebinichibel is a distorted transliteration of the Arabic "Banu Kalb", "sons of a dog". Which one may or may not find entirely convincing, especially regarding the relative positions of the "l" and the "b". But it certainly does look somewhat plausible.
There actually was an Arabic tribe called Banu Kalb in the early Middle Ages, but it does not seem that there is an obvious relation.