Pazuzu

This is probably the most famous demon whose name you may not know but whom youll recognize from pop culture. Pazuzu was the evil spirit that possessed the young girl Regan MacNeil in the classic horror film, The Exorcist and also appears on the album cover of the Gorillazs compilation album D Sides. He has a mans body, the head of a lion, two pairs of wings like an eagle, a scorpions tail, and a serpentine penis.