Concise Bible Dictionary:

King of Babylon who sent letters and a present to Hezekiah when he heard that he had been sick. Hezekiah was glad of this, but it was accepting the friendship of the world, to which as a result his posterity would be captives (Isa. 39:11At that time Merodach-baladan, the son of Baladan, king of Babylon, sent letters and a present to Hezekiah: for he had heard that he had been sick, and was recovered. (Isaiah 39:1)). Doubtless the same occurrence is referred to in 2 Chronicles 32:3131Howbeit in the business of the ambassadors of the princes of Babylon, who sent unto him to inquire of the wonder that was done in the land, God left him, to try him, that he might know all that was in his heart. (2 Chronicles 32:31), though the name of the king of Babylon is not mentioned, where it is stated that one object of the ambassadors being sent was to inquire respecting the “wonder that was done in the land,” namely, the shadow going back ten degrees (2 Kings 20:8-138And Hezekiah said unto Isaiah, What shall be the sign that the Lord will heal me, and that I shall go up into the house of the Lord the third day? 9And Isaiah said, This sign shalt thou have of the Lord, that the Lord will do the thing that he hath spoken: shall the shadow go forward ten degrees, or go back ten degrees? 10And Hezekiah answered, It is a light thing for the shadow to go down ten degrees: nay, but let the shadow return backward ten degrees. 11And Isaiah the prophet cried unto the Lord: and he brought the shadow ten degrees backward, by which it had gone down in the dial of Ahaz. 12At that time Berodach-baladan, the son of Baladan, king of Babylon, sent letters and a present unto Hezekiah: for he had heard that Hezekiah had been sick. 13And Hezekiah hearkened unto them, and showed them all the house of his precious things, the silver, and the gold, and the spices, and the precious ointment, and all the house of his armor, and all that was found in his treasures: there was nothing in his house, nor in all his dominion, that Hezekiah showed them not. (2 Kings 20:8‑13)). Here the king is called BERODACH-BALADAN.

Strong’s Dictionary of Hebrew Words:

of foreign derivation; Merodak-Baladan, a Babylonian king
KJV Usage:
Merodach-baladan. Compare 4781

Jackson’s Dictionary of Scripture Proper Names:

Merodach is not a lord: thy rebellion, Baal is lord

Potts’ Bible Proper Names:

Merodoch the mighty Lord; Baal-worshiper:―king of Babylon, Isa. 39:1. {Merodachus Dominus potens }