The sources and portrait belong to George WYTHE (1726-1806), not George WYATT (c1620s-after 1699?).
There may or may not be a genealogical connection, but it's still the wrong person.
Oh, here he is: George Wythe, signer of the "Declaration of Independence"
Now, why didn't he turn up in a straight name search, and why did I have to search on "wythe" alone to find him?
Fix it. Thank you Maven!
That's much better! *applause*
:)