Hi Tom -

James Boykin is descended thusly:

Edward Boykin - Isle of Wight, Va.
William Boykin
William Boykin
Burwell Boykin - Camden, S.C.
Frank Boykin - Alabama Pioneer
James Boykin

I am not sure but I think the Georgia family comes from Burwell's brother Francis Boykin from Revolutionary War fame.
Does this sound right to you? So yes we may be cousins I would love to get a copy of the diary. I will e-mail shortly.