Charles Ellicott Commentary Isaiah 37:13

"Where is the king of Hamath, and the king of Arpad, and the king of the city of Sepharvaim, of Hena, and Ivvah?" — Isaiah 37:13 (ASV)

Where is the king of Hamath ... — The question which had been asked in Isaiah 36:19 concerning the gods of the cities named is now asked about their kings, and the implied answer is that they are in the dungeons of Nineveh.

Hena, and Ivah. — The sites have not been identified, but Anah is found as the name of a city on the Euphrates, and Ivah may be the same as the Ava of 2 Kings 17:24.