Easton's Bible Dictionary (1897)
A servant of the king; probably an official title, an Ethiopian, “one of the eunuchs which was in the king’s house;” i.e., in the palace of Zedekiah, king of Judah. He interceded with the king in Jeremiah’s behalf, and was the means of saving him from death by famine (Jer. 38:7-13: comp. 39:15-18).
Hastings' Dictionary of the Bible (1898) & Schaff's Bible Dictionary
E'BED-ME'LECH (slave of the king), an Ethiopian eunuch of Zedekiah, king of Judah, who was instrumental in saving the prophet Jeremiah from death by famine, and who for his kindness in his behalf was promised deliverance when the city should fall into the enemy's hands, Jer 38:7; Jer 39:15-18. His name seems to have been an official title.
Hitchcock's Bible Names (1869)
the king's servant