What is a third cousin once removed?
A third cousin once removed is your third cousin's child, or your parent's third cousin. You share a great-great-grandparent line, and 'once removed' adds a single generation of separation between the two of you.
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FAQs
Are third cousins once removed close relatives?+
Genealogically they're distant — you share a great-great-grandparent — but they're still traceable family.
Does the calculator store my family details?+
No — it runs entirely in your browser. Nothing you enter is uploaded or saved on our servers.
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