Easton's Bible Dictionary (1897)
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.
Smith's Bible Dictionary (1863)
(hero), one of the chief Assyrian and Babylonian deities, seems to have corresponded closely to the classical Mars. (2 Kings 17:30) It is conjectured that he may represent the deified Nimrod.
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
NER'GAL (great hero), a deity of the Assyrians, and corresponding to Mars. 2 Kgs 17:30. Monuments have been found with his name and titles. (See cut p. 612.)
Hitchcock's Bible Names (1869)
the great man; the hero