And Cush begat Nimrod: he began to be a mighty one in the earth.
He was a mighty hunter before the LORD: wherefore it is said, Even as Nimrod the mighty hunter before the LORD.
And the beginning of his kingdom was Babel, and Erech, and Accad, and Calneh, in the land of Shinar.

Genesis 10:8–10, King James Version

Susan Wise Bauer has some great footnotes in her new book, The History of the Ancient World.

For example, this one from p. 269:

The chronology is difficult but Tukulti-Ninurta is probably the king called Nimrod in Gen. 10:10: a mighty hunter and warrior whose kingdom included Babylon, Erech, Akkad, and Nineveh, the same expanse as that claimed by Tukulti-Ninurta for Assyria. Weirdly enough, this Hebrew version of the name of the Assyrian great king has become an English synonym for a foolish and ineffectual man (“What a nimrod!”). The only etymology I can find for this suggests that, thanks to some biblically literate scriptwriter, Bugs Bunny once called Elmer Fudd a “poor little Nimrod” in an ironic reference to the “mighty hunter.” Apparently the entire Saturday-morning audience, having no memory of Genesis genealogies, heard the irony as a general insult and applied it to anyone bumbling and Fudd-like. Thus a distorted echo of Tukulti-Ninurta’s might in arms bounced down, through the agency of a rabbit, into the vocabulary of the twentieth century.