Rabmag

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.

(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.")