Albert Barnes Commentary 2 Kings 17:31

"and the Avvites made Nibhaz and Tartak; and the Sepharvites burnt their children in the fire to Adrammelech and Anammelech, the gods of Sepharvaim." — 2 Kings 17:31 (ASV)

Nibhaz and Tartak are either gods of whom we have no other record, or they are intentional corruptions of the Babylonian names Nebo and Tir. Tir was the great god of Borsippa and the patron deity of many Babylonian kings. In their scorn for polytheism, the Jews occasionally altered the names of pagan deities as a form of ridicule. Anammelech is possibly another instance of this contemptuous wordplay.

Adrammelech, meaning “the glorious king,” represents the sun. Assyrian inscriptions commonly designate Tsipar, or Sepharvaim (2 Kings 17:24), as “Sippara of the Sun.” The title “Adrammelech” has not yet been found in inscriptions to date, but it would clearly be a fitting title for the sun.

The Babylonian sun-god, Shamas, was paired at Sippara and elsewhere with a sun-goddess, Anunit, whose name may be represented in the biblical name Anammelech. The Hebrews likely took enough of Anunit’s name to be recognizable and then made its ending similar to that of the male deity, Adrammelech. This created a ridiculous effect, intended as an insult to the gods in question.