Easton's Bible Dictionary (1897)
Assyrian Rab-mugi, “chief physician,” “who was attached to the king (Jer. 39:3, 13), the title of one of Sennacherib’s officers sent with messages to Hezekiah and the people of Jerusalem (2 Kings 18:17-19:13; Isa. 36:12-37:13) demanding the surrender of the city. He was accompanied by a “great army;” but his mission was unsuccessful.
Smith's Bible Dictionary (1863)
(Jeremiah 39:3,13) a title borne by Nergal-sharezer, probably identical with the king called by the Greeks Neriglissar. [NERGAL-SHAREZER] (it probably means chief of the magi ; at all events it was “an office of great power and dignity at the Babylonian court, and probably gave its possessor special facilities for gaining the throne.”)
Hitchcock's Bible Names (1869)
who overthrows or destroys a multitude