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Second cousin 3 times removed

A second cousin 3 times removed is a relative of your own generation line, and the word works both ways: you are their second cousin 3 times removed too.

The route

IIIIIIIVVVIVIIYouYouParentParentParentParentParentParentChildChildChildChildChildChildChildChildChildChildChildChildParentParent

Red line: from you (3 steps up) and 6 steps down. Gold: the shared ancestor.

How to count it

Go up from you to the nearest ancestor you share with the other person. That takes 3 steps for you and 6 for them.

The smaller of the two, minus one, gives the degree: 2nd cousin. The two numbers differ by 3, so the cousins are 3 times removed.

Cousin counting is the standard genealogical convention. Different families and legal systems sometimes use looser words, so check the naming conventions guide if a relative uses a different term.

Facts at a glance

Termsecond cousin 3 times removed
Reciprocalsecond cousin 3 times removed
Steps up (a, b)3, 6
Cousin degree2nd
Removal3
Civil-law degree9
Canon-law degree6
Average DNA shared (full)0.39%
Average DNA shared (half)0.2%

Full and half

The figures above assume full relatives, who share a couple as common ancestors. If the link runs through just one person, because of a remarriage or a different other parent, the relationship is a half relationship. It is usually written half second cousin 3 times removed, and the average shared DNA falls to 0.2%. See full and half relatives.

The DNA numbers are theoretical averages. Real amounts vary a lot from one pair to the next, especially for distant cousins, so read the DNA guide before comparing against a test.

Check your own relationship in the calculator, or see where this term sits on the chart.