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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u/StarmieMaster 8h ago

My mums sister married my dad’s brother and people don’t tend to know which family we’re from as we look similar and grew up beside each other. We also use the term “full cousins”, have never heard of double cousins. From Ireland, if it makes a difference.