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What is my second cousin's child to me?

Your second cousin's child is your second cousin once removed, and you are their second cousin once removed too.

1.56% shared DNA on average. Real amounts vary.

Diagram: how your second cousin's child is related to youYouParentGrandparentGreat-grandparentscommon ancestorsGreat-aunt/uncleFirst cousin onceremovedSecond cousinSecond cousin onceremovedthem

you them common ancestors double line: marriage

You and your second cousin share great-grandparents. Their child is one generation further down, which adds one “removed”: your second cousin once removed.

Each generation of difference adds one removal; the cousin number stays the same. Your second cousin's child and your own child are third cousins.

How we worked it out

Follow the chain one step at a time:

  1. Your second cousin: second cousin (3 up, 3 down)
  2. Your second cousin's child: second cousin once removed (3 up, 4 down)

Your great-grandparents are their great-great-grandparents: they are your common ancestors.

They are one generation below you.

Count the generations to your common ancestors: 3 up from you, 4 down to them. The cousin number is one less than the smaller count (3), so second cousin. The counts differ by 1, so once removed.

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    Related questions

    Is my second cousin's child my third cousin?
    No. Your third cousins are in your generation. Your second cousin's child is your second cousin once removed, and a third cousin to your children.
    How much DNA do I share with my second cousin's child?
    About 1.6% on average. Distant cousins sometimes share no detectable DNA at all.

    More family relationship answers