Alluph: The name of this demon may be derived from the word aleph, the first letter of the Greek alphabet. In the Sacred Magic of Abramelin the Mage, Alluph is said to serve all four infernal princes of the cardinal directions equally, and therefore equally partakes of their powers.
Mathers parses his name as meaning either “duke” or “bull.” “Bull” is far more likely, as the pictograph that ultimately became the letter aleph originally represented the head of a bull.
SOURCE:
The Dictionary of Demons written by Michelle Belanger