Aim

Goetia - S. L. MacGregor Mathers (1904) 

The Twenty-third Spirit is Aim. He is a Great Strong Duke. He appeareth in the form of a very handsome Man in body, but with three Heads; the first, like a Serpent, the second like a Man having two Stars on his Forehead, the third like a Calf. He rideth on a Viper, carrying a Firebrand in his Hand, wherewith he setteth cities, castles, and great Places, on fire. He maketh thee witty in all manner of ways, and giveth true answers unto private matters. He governeth 26 Legions of Inferior Spirits; and his Seal is this, which wear thou as aforesaid, etc.

Pseudomonarchia daemonum - Johann Wier (1583)

Aym or Haborim is a great duke and a strong, he commeth foorth with three heads, the first like a serpent, the second like a man having two * the third like a cat, he rideth on a viper, carrieng in his hand a light fier brand, with the flame whereof castels and cities are fiered, he maketh one wittie everie kind of waie, he answereth truelie of privie matters, and reigneth over twentie six legions.

Dictionnaire Infernal - Collin de Plancy (1863) 

Haborym (aka Aym) is a fire demon and a duke of hell, who commands 26 legions. He appears holding a torch and riding a viper and he has 3 heads: a serpent, a man, and a cat. Some say he is the same as Raum.