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What is my grandma's cousin to me?

Your grandma's cousin is your first cousin twice removed, and you are their first cousin twice removed too.

3.13% shared DNA on average. Real amounts vary.

Diagram: how your grandmother's cousin is related to youYouParentGrandmotherGreat-grandparentGreat-great-grandparentscommon ancestorsGreat-great-aunt/uncleFirst cousin twiceremovedthem

you them common ancestors double line: marriage

Your grandmother's first cousin is your first cousin twice removed. They're a first cousin of someone two generations above you, and the shared ancestors are your great-great-grandparents (their grandparents).

Your grandma's cousin's children are your parent's second cousins, and your second cousins once removed.

How we worked it out

Follow the chain one step at a time:

  1. Your grandmother: grandmother (2 up, 0 down)
  2. Your grandmother's cousin: first cousin twice removed (4 up, 2 down)

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

They are 2 generations above you.

Count the generations to your common ancestors: 4 up from you, 2 down to them. The cousin number is one less than the smaller count (2), so first cousin. The counts differ by 2, so twice removed.

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    Your mom's first cousin once removed.
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    Your third cousin: you're the same generation and share great-great-grandparents.

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