A divine name appearing in 2 Kings 17:31, designating a deity worshiped by the Avvites, one of the foreign peoples settled in Samaria after the Assyrian conquest. Along with Nibhaz, Tartak was one of the gods the Avvites brought with them and continued to worship in their new land. The name has not been satisfactorily identified with any known deity from ancient Near Eastern sources, and its etymology remains uncertain. The Septuagint renders it Θαρθακ. The term appears in the context of syncretistic worship that mixed Yahwism with foreign deities—a practice the biblical text condemns.