2 Kings 19:9 - Albert Barnes' Notes on the Bible

Tirhakah king of Ethiopia - The Tehrak or Teharka of the hieroglyphics. He was the last king of the 25th or Ethiopian dynasty, which commenced with Shebek or Sabaco, and he reigned upward of 26 years. The Assyrian inscriptions show that he still ruled in Egypt as late as 667 B.C., when Esarhaddon 2 Kings 19:37 died, and his son Asshur-bani-pal succeeded him. He probably ascended the Egyptian throne about 692 B.C., having previously ruled over Ethiopia before he became king of Egypt (compare Isaiah 37:9). Thus he was probably reigning in Ethiopia at the time of Sennacherib’s expedition, while Sethos and perhaps other secondary monarchs bore rule over Egypt. His movements caused Sennacherib to send a second embassy, instead of marching in person against the Jewish king.