DEMONS in the Ars Goetia
The demons' names are taken from the Ars Goetia, which differs in terms of number and ranking from the Pseudomonarchia Daemonum of Johann Weyer. As a result of multiple translations, there are multiple spellings for some of the names. 
 
Astaroth (also Ashtaroth, Astarot and Asteroth) is referred as a very powerful demon. In art, in the Dictionnaire Infernal, Astaroth is depicted as a nude man with feathered wings, wearing a crown, holding a serpent in one hand, and riding a beast with dragon-like wings and a serpent-like tail. 
 
According to Sebastien Michaelis he is a demon of the First Hierarchy, who seduces by means of Astaroth's seal. His adversary is St. Bartholomew, who can protect against him for he has resisted Astaroth's temptations. To others, he teaches mathematical sciences and handicrafts, can make men invisible and lead them to hidden treasures, and answers every question formulated to him. He was also said to give to mortal beings the power over serpents. His name is possibly taken from the goddess Asherah or Astarte.