The Four Crown Princes of Hell, according to Anton Szandor LaVey, are:

Satan - the South; adversary, opposite, accuser, Lord of Fire, the Inferno
Lucifer - the East; bringer of light, enlightenment, the Air, the Morning Star
Belial - the North; without a master, baseness of the Earth, independence
Leviathan - the West; the serpent of the deeps, the Sea
