Questions tagged [relationship-analysis]

For questions about determining or interpreting familial relationships.

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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
10 votes
6 answers
45k views

Is a half-sibling match on AncestryDNA reliable, or is more testing needed?

I'm new at the DNA testing but here are my results. After receiving my DNA results in January 2016 my first match was with a known cousin who is also on Ancestry with a score of 959 centimorgans at 41 ...
  • 101
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, ...
  • 4,417
7 votes
0 answers
202 views

Can I determine the relationship between Mary Anne Wright (nee Harper) and Charles William Kimmons?

In the 1901 census for England, Mary Ann Wright (nee Harper) was living in Kings Norton, Worcestershire (not Birmingham) with her husband Stanley and her children. In the 1911 census she's shown as a ...
's user avatar
6 votes
3 answers
4k views

Determining if an autosomal and X-DNA match is my half-sibling?

I am adopted and have info on my maternal side, but not paternal. I recently got a match through AncestryDNA with someone saying we were close relatives. This man and I share 2086 centiMorgans in ...
  • 61
6 votes
2 answers
171 views

How could I automaticaly analyse relationships in large set of vital records?

My family research right now is based on digitalized 19th century vital records. These, of course, are scans of the original, not text. There is, though, a third party project where people have ...
  • 421
6 votes
1 answer
350 views

False-Positives in Autosomal DNA Matches

I have spent a significant amount of time and effort beating my head on brickwalls that appear when tracking Ancestry Autosomal DNA matches. I've had success in establishing document trails with ...
  • 1,089
5 votes
1 answer
127 views

Can the amount of saliva affect how many centiMorgans are shared between 1st cousins?

I share 279 centimorgans with a 1st cousin in 12 segments. I don't believe that is enough to be considered 1st cousins. She says she couldn't spit a lot. Would a small amount of spit affect the ...
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
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 ...
  • 769
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?...
5 votes
1 answer
180 views

Can a person adopt their own parent or grandparent?

A recent question on Finding Loops in GEDCOM files got me to wonder if there are some loops that are valid. Of course there is science fiction, where a person goes back in time and parents their own ...
  • 16.5k
4 votes
2 answers
6k views

Sharing 52% DNA with mother

I received my 23 and me results and it says I share 52% DNA with my mom. Is this possible?
4 votes
2 answers
9k views

Predicted percentages of shared DNA for DNA tests of half-siblings?

My half brother and I each had an Ancestry DNA test. I am female. We share a biological father. Different mothers. Test results show he is my 1st cousin. I am confused. Can you please help me to ...
4 votes
1 answer
756 views

Distinguishing half siblings from cousins using AncestryDNA?

My husband recently took an AncestryDNA test to see if he could find out who his father was, at least through matches. His closest match that came up was a female who shares 1390 cms across 45 ...
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: ...
  • 5,247
4 votes
1 answer
6k views

What relation is my Half-Aunt to her DNA Matches?

I have recently discovered through an Ancestry DNA test + GEDMatch that my Aunt is my half-Aunt and that she and my mother don't share the same biological father. Looking at my Aunt's DNA Matches on ...
4 votes
1 answer
173 views

Possible Half Sibling

I was adopted as a small child and have never known my natural mother or father. I recently completed an AncestryDNA test and have been matched against a lady with a score of 1,912 cM across 73 ...
4 votes
1 answer
605 views

Understanding AncestryDNA match of 1,866 cM if not Half Sibling?

I have somewhat recently started using Ancestry.com, so just a fair warning that I'm still learning how everything works! That being said, I am the child of my biological mother, who I know, and an ...
  • 41
4 votes
2 answers
636 views

Is it possible to fall below the lowest amount of shared cMs for a half first cousin and still be a half first cousin?

My father's grandfather was born as one of a set of twins to a woman named Margaret, back in 1886. Margaret was a widow with other children at the time of the birth of the twins. She kept one and ...
  • 41
4 votes
1 answer
101 views

What is "Geschwisterkind von muetterlicher seit"?

I have a death record from 1790 Alsace. It concerns a one-year old child named Johann Philipp Gassmann, son of Johann Erhardt Gassmann and Margaretha Bley. As seems customary in Alsace at the time, ...
  • 1,581
4 votes
2 answers
276 views

Identifying John Morgan, son of Thomas D. Morgan (1809-1870)?

I have a real dilemma. I have found a DNA link to the Thomas Morgan (1791-1860) family through Frances Denira "Fanny" Morgan (1821-1899), daughter of Benjamin Francis Morgan (1762-1835), who was the ...
  • 41
3 votes
2 answers
176 views

Determine family from obituary

I have a very poorly set up obituary and I need to determine who the 7 children and their families are, but the the way it is laid out and the punctuation are making this quite difficult for me. The ...
  • 16.5k
3 votes
2 answers
158 views

Not sharing any centimorgans with person who mother shares 102cM?

My mother (age 96) shares 102.1 cM with a man (age 72). However, I do not share any cMs with him. What could their relationship be and why don't I share any cMs with him?
3 votes
2 answers
77 views

Is autosomal DNA testing sensitive enough to distinguish non-paternity events many generations ago?

I have been researching my family line for decades, and have run into quite a brick wall with my earliest known progenitor, Daniel Cooper Sr. (1695-1795). There is an oft-repeated story about him ...
3 votes
3 answers
214 views

How can two different generations of one family be a half sibling to an outsider?

My full paternal uncle and I enough cM with an outsider to both be listed as half siblings to an unknown male. My uncle shares more cM with that unknown male than I do (a female). Both my uncle and I ...
3 votes
2 answers
948 views

Determining if 2nd cousin is father from DNA test?

My partner is waiting on her DNA results. She strongly suspects that her 2nd cousin is her father (long story). Will the DNA results reveal the possibility from more concentrated markers, or less ...
3 votes
1 answer
403 views

What is "dritter Grad der Blutsverwandtschaft" (third degree/grade of blood relationship)

Just found the term "dritter Grad der Blutsverwandtschaft" in a 1793 marriage record of northern Alsace. I know that I can translate this to "third degree or grade of blood relationship", but that ...
  • 1,581
3 votes
3 answers
171 views

AncestryDNA showing No Match for Half Aunt?

My father's half sister just posted her AncestryDNA results. I did not come up as a match, nor did my sister. Does this mean that my father's dad is not really his dad, or could there be another ...
3 votes
1 answer
452 views

How can 3/4 siblings share mother but not paternal ancestry?

My family is running the DNA test gauntlet and my dad got back some interesting results. He is related to his half sister (1,687 cM across 66 segments) at a level that is to be expected. He is ...
  • 31
3 votes
3 answers
3k views

Can half siblings share no common DNA?

My half sister and I share the same father, but different mothers. Because my paternity was questionable we both did an Ancestry DNA test....I matched to relatives of my grandmother and she didn't.......
  • 21
3 votes
1 answer
355 views

How could we be related. All combinations make zero sense

I the poster is K2 as related below Objective: Learn how T and G fit into the K's tree T&G appeared in DNA match with CM to K2 (K1 is still in testing) BackGround T and G are siblings born ...
3 votes
1 answer
122 views

Relationship to DNA match who may share my mother with my great-uncle

I know this will sound far-fetched, but maybe someone can help me. DNA Match through Ancestry shows: 'First Cousin' match at 820 CM over 37 segments (Let's call him Tom) 'Second Cousin' match at 541 ...
  • 33
3 votes
1 answer
4k views

Shared centimorgans of first cousins with different paternal grandmothers? [duplicate]

On average, how would range of shared centimorgans compare between first cousins who have same paternal grandmother versus first cousins with different paternal grandmothers, same paternal grandfather ...
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
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, ...
's user avatar
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 ...
  • 5,531
3 votes
1 answer
96 views

What is Ellen M Berry's relationship in this Census Record?

I'm looking at the 1880 census record for a Ellen M Berry. She stuck out to me as odd, being much younger than anyone else in the family, despite the transcription saying she was a daughter. She also ...
3 votes
1 answer
2k views

Shared centimorgans of second cousins with different paternal grandfathers?

I'm new. Just reading the useful answer to a question about shared centimorgans of first cousins with different paternal grandmothers. I share 238 cM with a second cousin. We can be pretty sure that ...
  • 31
3 votes
0 answers
54 views

Second cousins or double second cousins?

My parents share a set of first cousins but don’t share any common ancestors. I then share four great grandparents with my second cousins. Would they be considered my second cousins or double second ...
  • 31
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 ...
2 votes
2 answers
517 views

Understanding why first cousins may share only 360 cM

I have taken a closer look at the info on my 23andMe match with my known 1st cousin. It says we share 360 Centimorgans, and the Centimorgan charts I've looked at suggest this is potentially outside ...
  • 1,635
2 votes
2 answers
108 views

Determining relationship to cousin solely based on mutual relationships to other cousins

Background I am researching genealogy on 23andMe.com, trying to find new cousins and determine their relationships to me. All the site gives me is a list of people and their predicted cousin-...
  • 121
2 votes
1 answer
119 views

Mapping DNA relationships on paper

I have recently started digging into my DNA matches. I have several closely related matches. I was born in Montana and my grandma was married to a man who has no biological relationship to me. However ...
2 votes
2 answers
223 views

Understanding shared DNA of 1,576 cM with great nephew

I had my DNA tested through Ancestry. About a year ago, my great nephew (I'll call him GN-1) whom I raised had his tested. The match came up Close Family–1st Cousin Shared DNA: 1,576 cM across 69 ...
2 votes
1 answer
228 views

Sisters who match to me have very different centimorgans?

I have done a DNA test and show a 2nd cousin match with 313 cM and then a 4th cousin match with 67cM yet these two matches are sisters with the same parents. How is this possible?
  • 21
2 votes
2 answers
155 views

23andme shows a man as my dad's cousin, but ancestry.com shows him as my dad's brother

I did 23andme, and so did our mystery man. Two of my grandfather's brothers also did 23andme, as well as a number of the kids and grandkids of my grandfather's brothers and sisters (my grandfather ...
2 votes
1 answer
170 views

Evaluating half sibling using AncestryDNA? [duplicate]

Recently we (two full sisters and a full brother) think we may have found a half brother who is 50 years old on Ancestry DNA, where he is being categorized as Close Family-First Cousin. sister 52yr ...
  • 31
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 ...