Who is…
Tartak

Hebrew: תַּרְתָּק —transliteration: Tartaq —occurrences: 1

The is one of the false gods of the Avvites (Avites, Arvites, Avvim), who colonized part of Samaria after the deportation of Israel by Shalmaneser (2 Kings 17:31).

The other god of the Avvites is Nibhaz.

…each nation was still making gods of its own and put them in the houses of the high places which the people of Samaria had made, each nation in their cities in which they lived. And the men of Babylon made Succoth-benoth, the men of Cuth made Nergal, the men of Hamath made Ashima, and the Avvites made Nibhaz and Tartak; and the Sepharvites burned their children in the fire to Adrammelech and Anammelech, the gods of the Sepharvaim. —2 Kings 17:29-31 excerpt