(chief whom Nebo favors), the Rab-tabbachim i.e. chief of the slaughterers (Authorized Version “captain of the guard”), a high officer in the court of Nebuchadnezzar. On the capture of Jerusalem he was left by Nebuchadnezzar in charge of the city (comp. Jeremiah 39:11). He seems to have quitted Judea when he took down the chief people of Jerusalem to his master at Riblah (2 Kings 25:18-20). In four years he again appeared (Jeremiah 52:30). Nebuchadnezzar in his twenty-third year made a descent on the regions east of Jordan, including the Ammonites and Moabites, who escaped when Jerusalem was destroyed. Thence he proceeded to Egypt, and, either on the way thither or on the return, Nebuzar-adan again passed through the country and carried off more captives (Jeremiah 52:30).
Smith's Bible Names Dictionary (1866).