From rab and a foreign word for a Magian; chief Magian; Rab-Mag, a Bab. Official -- Rab-mag.
see HEBREW rab
H7248. Rab
-mag מָ֑ג noun masculine soothsayer, magian (loan-word from Assyrian ma——u, soothsayer, DlHWB 397; perhaps originally Sumerian, DlHA 14); — רַבמָֿ֑ג Jeremiah 39:3, 13 chief-soothsayer, in train of Nebuchadrezzar.
מַגְבִּישׁ V. מִגְבָּלֹת גבשׁ see גבל.
מִגְבָּעוֺת see גבע.
מגד (√ of following; compare Arabic , , be glorious, excel in glory).