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What is my mom's uncle to me?

Your mom's uncle is your great-uncle (also called granduncle or grand-uncle); you are his great-niece or great-nephew.

12.5% shared DNA on average. Real amounts vary.

Diagram: how your mother's uncle is related to youYouMotherGrandparentGreat-grandparentscommon ancestorsGreat-unclethem

you them common ancestors double line: marriage

Your mom's uncle is your grandparent's brother: your great-uncle, or granduncle in genealogy. Your mom's aunt is your great-aunt (grandaunt).

It's “great-uncle”, not “great-great-uncle”. Each “great” adds one generation above your aunts and uncles.

How we worked it out

Follow the chain one step at a time:

  1. Your mother: mother (1 up, 0 down)
  2. Your mother's uncle: great-uncle (3 up, 1 down)

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

He is 2 generations above you.

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    Related questions

    What is my mom's uncle's son to me?
    Your mom's first cousin, and your first cousin once removed.
    What is my mom's great-uncle to me?
    Your great-great-uncle (great-granduncle).

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