Ukobach

Ukobach is a low-ranking demon from the book Dictionnaire Infernal by Jacques Collin de Plancy. He is thought to have created fireworks and fried food. He is depicted covered in flames and tasked by Beelzebub with tending the oil in the cauldrons of Hell. He tortures the souls of the damned by throwing hot coals on them. Some beliefs describe him as the lamp oil used in jack-o-lanterns.

Citations:

Guiley, Rosemary. The Encyclopedia of Demons and Demonology. United States, Facts On File, Incorporated, 2009.