Questions tagged [relationship-analysis]

For questions about determining or interpreting familial relationships.

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4 votes
1 answer
911 views

Determining likely relationship based upon autosomal DNA shared cM

Given two tests that share some cM of autosomal DNA, how can I easily find the predicted relationships that such shared cM would suggest? For example, a 2,200 cM match suggests it could be either: ...
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5 votes
1 answer
951 views

Inferring father/son relationships from Senior (Sr.) / Junior (Jr.) naming?

As in my other questions, I am investigating the spread of the Blackstone family name in early America. I came across the following tidbits and I would like to know if my interpretation is (likely to ...
5 votes
1 answer
11k views

Distinguishing half sibling, uncle or half nephew using Ancestry DNA?

My husband did ancestry dna to find any info on his biological fathers side. He just got a “close family” match with whom they share 1440 cM across 49 segments. Is it possible to be a half sibling?...
20 votes
5 answers
479 views

How can I establish (and describe) my confidence that the child and adult are the same person?

My two general questions are: At what point can one say that, yes, the adult you have identified as your ancestor is the same person as the child you think might be your ancestor, and that you have ...
  • 2,988
3 votes
1 answer
2k views

What would the starting shared cM number be for abnormally close relationships in Autosomal DNA test?

I have seen in the examination of family trees where individuals sharing a great grand parent marry and have children, somewhat commonly in pre-American Civil War, which I would think would create ...
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2 votes
3 answers
306 views

Determining if 1,814cM match from AncestryDNA is Half Sibling?

My son recently had a match come up as close family the match is male and 1814cm. His only living grandfather is already in our tree at 1857cm. All other grandparents are deceased and have never ...
9 votes
3 answers
269 views

Support for variants of family-unit

I hope everyone will agree that the definition of a "family unit" is very subjective. Although many products, and the old GEDCOM format, offer some type of FAM record, I have never seen an agreed ...
  • 5,897
9 votes
1 answer
156 views

How were the beneficiaries of the 1872 Will of Mary Rogers related?

My fourth great grandmother was Elizabeth Crawley, born 1791, probably in London. She married William Stretch in 1819 in Whitechapel. The witnesses to their marriage were D. Rogers and Mary Rogers, ...
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3 votes
3 answers
32k views

Possible half-sibling based on matching Centimorgans

I have been using Ancestry.com for years. A year back I submitted my DNA test. I have had quite a few matches that land in the distant relative to 3rd or 2nd cousin range. Recently, I was notified ...
3 votes
1 answer
21k views

What is expected shared cM of cousins with only one shared grandparent?

Related to What is expected shared cM of double third cousins?, what would the expected range and average shared cM be? In this case, I'm seeing 64.0 cM over 3 segments. Looking at the table, that ...
  • 5,247
5 votes
1 answer
150 views

Could "Our Mother" be a term of endearment on 1855 headstone?

In researching my great great grandmother, Elizabeth Cowan Short, I have located her death record in Franklin County, Ohio, USA (1896), as well as her burial record. They record her birth as 29 ...
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3 votes
1 answer
344 views

How is this relationship likely to be 'identified' by a DNA testing company?

I have recently made contact with a putative (half)-first-cousin with whom I may share a grand-father. There is not a definitive documentary trail that confirms her grandfather and mine are the same, ...
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1 vote
2 answers
267 views

Does 1,864 centimorgans indicate half-siblings? [duplicate]

My sister, daughter and I all took DNA tests for fun. My sister and I show up on Ancestry as "close family," and share 1864 Centimorgans, and we do not share any relatives that my daughter and I share ...
1 vote
1 answer
401 views

Does AncestryDNA match of 1,697cM indicate half sibling or aunt?

I just received my AncestryDNA results. It shows I have a close family match with a woman who would be my grandmother, aunt, or half-sibling. We matched 1,697cM with 51 shared segments. It cannot be ...
0 votes
1 answer
175 views

Is AncestryDNA match of 1,655 cM a half sibling? [duplicate]

Shared DNA: 1,655 cM across 46 segments. Can someone that shows this as one of my matches on AncestryDNA be a half sibling?
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0 votes
2 answers
121 views

Understanding DNA match of 1,723 cM

I have a DNA match of 1,723 cM with a male 6 years younger than me. His father is one of a twin, could my match be not my half-sibling but my 1st cousin.
0 votes
1 answer
107 views

How do Genetic Percentages in Common Compare to Possible Familial Relationships?

I recently was contacted about a deceased half-sister who is 11 years older than me. I did a 23AndMe test, and it shows us as 1st cousins with 13.57% shared DNA. An adoption agency lists my mother as ...
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