Isimud (also Isinu; Usmû; Usumu (Akkadian)) is a minor god, the messenger of the god Enki in Sumerian mythology. He is readily identifiable by the fact that he possesses two faces looking in opposite directions. ... Found on http://en.wikipedia.org/wiki/Isimud
1) Mesopotamian god 
Isimud (also Isinu; Usmû; Usumu (Akkadian)) is a minor god, the messenger of the god Enki in Sumerian mythology. He is readily identifiable by the fact that he possesses two faces looking in opposite directions. ...