There is a joke in my family that my father's father is not his biological father. He only has sisters and his father is dead, so there's no possibility of a true test. But I'm his daughter and I did a DNA test, and here's what I got.

I got DNA results back and here's what it says about one of my aunts that tested too. Great aunt or cousin is the link they gave us.

12,2% (866,2‎ cM)
DNA shared
Segments shared
106,2‎ cM
Segment longest

Does that actually mean the joke is true and my aunt is my half aunt?


From The Shared cM Project 3.0 tool v4 for 866 cM the possible relationships do not include aunt.

However, they do include half aunt.

  • yes I did use that, so it tends to confirm my aunt is my "half aunt" – Emma Levillair Dec 28 '19 at 9:28

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