The great dog; that is, lion, one of the chief gods of the Assyrians and Babylonians (2 Kings 17:30), the god of war and hunting. He is connected with Cutha as its tutelary deity.
Easton’s Bible Dictionary
Nergal
Name meaningthe great man; the hero
Easton’s Bible Dictionary (1897), public domain. Text via Theographic Bible Metadata, CC BY-SA 4.0.