The term 'King of Judah' refers to three different kings from the Kingdom of Judah in the Hebrew Bible. Hezekiah, who reigned from 727-698 BCE, was known for his religious reforms and for successfully defending Jerusalem against the Assyrian Empire. Jehoiachin, who reigned from 598-597 BCE, was the last king of Judah before the Babylonian Exile. Josiah, who reigned from 640-609 BCE, is remembered for his religious reforms and for his efforts to centralize the kingdom.