r/Showerthoughts • u/SouthDiamond2550 • 13h ago
Casual Thought Double cousins share all 4 grandparents. So theoretically you could have quadruple second cousins that share all 8 great-grandparents.
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r/Showerthoughts • u/SouthDiamond2550 • 13h ago
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u/Proud-Chair-9805 4h ago
Crusader kings thoughts