"Any number of biographies of Edward DeVere discuss Lord North. I've consulted, for example: Edward de Vere (1550-1604): The Crisis and Consequences of Wardship by Daphne Pearson, and, Monstrous Adversary: The Life of Edward de Vere, 17th Earl of Oxford by Alan H. Nelson."

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Ugh, you're going to compel me to read Nelson. Fine. And the Pearson currently seems to be the world's most expensive book on De Vere. You're killing me, man. Haha. 

But actually, I was meaning to ask about George North. I have several sources which mention Lord North. I just can't seem to find any mention of George: as he relates to anyone in question here, Oxford, Lord North, Roger North, anyone. Know of anything which mentions George's relationship to any of these folks?

Rebecca: regarding the relationship of Marlowe to Shakespeare, I find Whittemore's commentary on that compelling (though, I'm a devout Oxfordian, so, of course I would):

In the Illustrated Catalogue of Fine and Rare Books, Issue 251, by Myers & Co., Booksellers, London, we can read that the original manuscript of "Discourse on Rebellion and Rebels" was dedicated by George North to Lord North.

I do not have a source that discusses Oxford and George North, but since Oxford was being directly spied upon by Lord North, at the service of Burghley, and Oxford was related to Lord North, who was related to George North, I cannot imagine these men were ignorant of each other.

Do we have proof Lord North and George North were related? Seems it's just speculation (though a fairly good one, I would agree). We don't even know when he was born, do we, or into which branch of North family?