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What is my grandma's sister to me?

Your grandma's sister is your great-aunt (also called grandaunt or grand-aunt); you are her great-niece or great-nephew.

12.5% shared DNA on average. Real amounts vary.

Diagram: how your grandmother's sister is related to youYouParentGrandmotherGreat-grandparentscommon ancestorsGreat-auntthem

you them common ancestors double line: marriage

Your grandma's sister is your great-aunt. Genealogists often say grandaunt, because she is in your grandparents' generation. Both words mean the same person.

Your grandma's brother is your great-uncle (granduncle). Their spouses are your great-aunt and great-uncle by marriage.

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 sister: great-aunt (3 up, 1 down)

Your great-grandparents are her parents: they are your common ancestors.

She is 2 generations above you.

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    Related questions

    Is it great-aunt or grand-aunt?
    Both are right. “Great-aunt” is the everyday word; many genealogists prefer “grandaunt” because it lines up with grandmother. One generation up they differ: a great-grandparent's sister is a great-great-aunt in everyday speech but a great-grandaunt to genealogists.
    What am I to my grandma's sister?
    You are her great-niece or great-nephew (also called grandniece/grandnephew).

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