In Collin de Plancy’s book, Dictionnaire Infernal, Xaphan was one of the fallen angels. He rebelled with Satan, and is a demon of the 2nd rank.
He is said to have an inventive mind and came up with the idea to set fire to heaven before he and the other fallen were cast out.
He has a bellows as an emblem, but must fan the flames of the abyss with his mouth and hands.
List as Demon #63 – Dictionnaire Infernal