Esarhaddon King of Assyria - Isaiah 37:38
Esarhaddon was one of the most powerful of the Assyrian kings. Immediately upon ascending the throne he had to put down serious revolts and defeat the Chaldaeans (Babylonians). He was successful in both enterprises. He is most noted for his conquest (673–670 B.C.) of Egypt, where, after initial difficulties, he captured the egyptian city of Memphis. Esarhaddon was the son of Sennacherib and was succeeded by Ashurbanipal.

The Esarhaddon Chronicle
This chronicle is part of a group of documents known as the Babylonian Chronicles which recorded major events in the history of Babylon. Almost all of the ancient tablets are in the possession of the British Museum. The Esarhaddon Chronicle not only contains the name of this Assyrian king Esarhaddon, but it also includes the names and titles for Sennacherib, Tirhakah and Necho. These four kings are all found in the Bible.

“The first year of the reign of Esarhaddon. For eight years under Sennacherib, for twelve years under Esarhaddon” - Esarhaddon Chronicle Inscription

Esarhaddon Prism Inscription
The ruins of Kuyundshik yielded more inscriptions from Esarhaddon which are now stored in the British Museum. The following quotes are inscribed on the Esarhaddon Prism.

"I gathered together the kings of Syria and the kings from across the sea, Baal the King of Tyre, Mennaseh the King of Judah" – Esarhaddon Prism Inscription

“The majesty of my sovereignty overwhelmed Hezekiah” – Esarhaddon Prism Inscription

Mennaseh and Hezekiah were both kings of Israel according to the biblical record.

Esarhaddon Stone Lion's Head
The white limestone statue comes from the Temple of Shamash. Known as the Ebabbar (Shining Temple), it was one of the most important traditional and prestigious religious centers in Mesopotamia. The lion’s head, which was originally inlaid, bears an inscription naming the Assyrian king Esarhaddon (680-669 BC) and his father Sennacherib. Lions were regularly represented in Mesopotamian art on wall reliefs and as elements of furniture.

Plaque of King Esarhaddon and Queen Nakija
The relief resides in the Louvre Museum. It depicts King Esarhaddon, followed by his mother Queen Nakija, the wife of Sennacherib. Only a fragment of the image remains, but the inscription clearly identifies King Esarhaddon and his mother Queen Nakija, both depicted in a religious scene, perhaps part of a procession. The king is wearing a beard and the truncated conical tiara of the Assyrian sovereigns. Esarhaddon is holding a staff or weapon in his left hand, no doubt an insignia of power, while Nakija has a mirror.

Esarhaddon Ancient Inscription Translations | Transcriptions
The following pdf documents contain translations of ancient inscriptions of the Assyrian King Esarhaddon.

Treaty of Esarhaddon and Baal King of Tyre
The Oracles of Esarhaddon King of Assyria
Esarhaddon Syro-Palestinian Campaign