Double cousins share all 4 grandparents. So theoretically you could have quadruple second cousins that share all 8 great-grandparents.


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Double cousins share all 4 grandparents. So theoretically you could have quadruple second cousins that share all 8 great-grandparents.
Double cousins share all 4 grandparents. So theoretically you could have quadruple second cousins that share all 8 great-grandparents.


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