WordNet (r) 3.0 (2006):

Merodach
    n 1: the chief Babylonian god; his consort was Sarpanitu [syn:
         Marduk, Merodach, Baal Merodach, Bel-Merodach]

Easton's 1897 Bible Dictionary:

Merodach
   death; slaughter, the name of a Babylonian god, probably the
   planet Mars (Jer. 50:2), or it may be another name of Bel, the
   guardian divinity of Babylon. This name frequently occurs as a
   surname to the kings of Assyria and Babylon.


Hitchcock's Bible Names Dictionary (late 1800's):

Merodach, bitter contrition