Jamieson, Fausset and Brown on Ezra 4:9

9. the Dinaites--The people named were the colonists sent by the Babylonian monarch to occupy the territory of the ten tribes. "The great and noble Asnappar" was Esar-haddon. Immediately after the murder of Sennacherib, the Babylonians, Medes, Armenians, and other tributary people seized the opportunity of throwing off the Assyrian yoke. But Esar-haddon having, in the thirtieth year of his reign, recovered Babylon and subdued the other rebellious dependents, transported numbers of them into the waste cities of Samaria, most probably as a punishment of their revolt [Hales].