Questions tagged [half-siblings]

Use for questions about people who share one parent but not the other

6 questions with no upvoted or accepted answers
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Understanding 1,537cM match to person and 1,950cM match to their uncle

I have a match with a female that is a few years younger than me (she is in the 60s). She and I match at 1,537 cM across 47 segments. Her Uncle (Paternal Uncle, as far as I know) is a match with me ...
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126 views

Half siblings or double cousins?

MB= my brother (1/2 sibling) MC=cousin (our mother's sister's daughter given up for adoption-no longer married to SS) DC=cousin to both of us but either 1/2 sibling to my brother or double cousin) AS= ...
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25 views

Interpreting dna results

On the combined siblingship index the number was 0.2486. The probability of them being half siblings were 19.9% and the likelihood of them not sharing a common biological parent is 4-1. I need help ...
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33 views

Using AncestryDNA to verify if sister also aunt

My bio dad adopted my sister. We share the same mother. I recently found her birth certificate, and on it was grandfathers name. It was in German so I do not really understand it all. Our mother has ...
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1answer
65 views

Distinguishing half siblings from first cousins (possible fathers are brothers) using shared cM

Regarding half siblings, sent my DNA to Ancestry came to a match of half sibling at 1530 cMs @ 99% half sibling however was in contact with such match and he is claiming my father or one his two ...
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30 views

Matching one cousin more than double their sibling

I have a 1883 cM match with my first cousin. I have a 762 match with his brother, and a 4462 match with my sister. Is there an explanation?