|Int. Standard Bible Encyclopedia|
na'-than-mel'-ek (nethan-melekh, "king's gift"): A Judean official, to whose chamber King Josiah removed "the horses of the sun" (2 Kings 23:11). The Septuagint calls him "Nathan, the king's eunuch" (Nathan basileos tou eunouchou).
Nathanmelech (1 Occurrence)
2 Kings 23:11 And he took away the horses that the kings of Judah had given to the sun, at the entering in of the house of the LORD, by the chamber of Nathanmelech the chamberlain, which was in the suburbs, and burned the chariots of the sun with fire. (KJV)