Rezin

Rezin - firm; a prince, a king of Syria, who joined Pekah (q.v.) in an invasion of the kingdom of Judah (2 Kings 15:37; 16:5-9; Isa. 7:1-8). Ahaz induced Tiglath-pileser III. to attack Damascus, and this caused Rezin to withdraw for the purpose of defending his own kingdom. Damascus was taken, and Rezin was slain in battle by the Assyrian king, and his people carried into captivity, B.C. 732 (2 Kings 16:9). [Source]

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Shoshenq IV
(Akheperre-setepenre)
773-735 B.C.
22nd Dynasty

Shoshenq IV was the ninth king of the Twenty-second Dynasty. The Serapeum stela of Pasenhor is dated as the thirty-seventh year of Shoshenq IV. This shows that he reigned at least this long. In the year 732, toward the end of his reign, an Assyrian, Tiglath-pileser III took Damascus and killed Rezin. He then captured many cities of northern Israel and took the people to Assyria. The Egyptian troops had at one time joined forces with Damascus, Israel and some other states to resist Shalmaneser III at Qarqar. There is no indication that Shoshenq IV made any attempt to help the former allies. [Source]