Abelaios: A demon who aids in spells of invisibility, Abelaios appear in Mathers’ translation of the Clavicula Salomonis. He is said to answer to the demon Almiras, master of invisibility, and to Almiras’ infernal minister, Cheros. This demon also appears in the Mathers translation of the Sacred Magic of Abramelin the Mage.

Source : The Dictionary of Demons written by Michelle Belanger.