Questions tagged [half-siblings]

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

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12 views

Half siblings connection to another match who is probably a 2C

I am trying to find the relationship of #3 to #1 and #2 #1 is a 20 y/o male with connection to #3 as follows: 299.3cM; largest segment 59.8Q...Total X cM is 109.9cM; largest segment is 66.4cM #2 is a ...
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1answer
38 views

Distinguishing aunt from half sister using X and autosomal DNA [duplicate]

My dad died 4 years ago. But my grandfather (his dad) could be my bio dad. We have made a test with my aunt (his full sister) and we share 25,27% dna (1860,2cM 43 segments max136,2cM) With Geneanet we ...
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19 views

Half Sibling/First cousin [duplicate]

From reading many sources, I've discovered that half siblings' shared centimorgans typically range from 1300-2300? And I'm curious about cm lengths in combination with that number. If a person had ...
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1answer
79 views

Assessing likelihood of incest using AncestryDNA results

My mother was raped by her father sometime in her adolescence. There was a trial and he was acquitted, but it is generally known and accepted in our family that the rape did occur. I don’t know if the ...
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44 views

Interpreting shared DNA information from FTDNA test

I am brand new to DNA testing and relationships. We did a 23 and me due to a health scare, there was a sale so we say why not see ancestry and family too. My husband's test came back saying someone he ...
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2answers
69 views

Determining likely relationship for DNA match of 1,148cM

Was not looking to discover my father wasn't my bio dad. Now I have a match claiming I'm his half- aunt. I'm hoping that I'm NOT his parent’s half-sibling but instead their half-cousin. Is it possible?...
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53 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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45 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
53 views

Making sense of low DNA match for half-siblings

My DNA match on Ancestry was thought to be my half sister. After my test came back, 713 cMs across 20 segments, 10% shared DNA, longest segment 136, that says my Grandfather would be her father, but ...
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1answer
84 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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12 views

Determining AncestryDNA Match relationship [duplicate]

I had my DNA tested through Ancestry.com. My closest match shares 2041cm. Is it safe to say this is probably a half-sibling? Are other ways of confirming this relationship?
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31 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?
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2answers
107 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.
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1answer
44 views

Does DNA match of 1,781 cM suggest half siblings? [duplicate]

I have been contacted by someone who says we are half sisters due to our DNA match. Our DNA is 1,781 which apparently is a high match. Would this make us half sisters? I am an only child and she is ...
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1answer
25 views

Is 1,147 cM match for half sibling or cousin

I have an 855 cM match with a mystery 1st-2nd cousin. My cousin has an 1,147 cM match to the same mystery cousin. Is it possible the 1,147 cM match could be a half sibling?
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1answer
38 views

Can my half uncle's, half sister be my 1st cousin once removed?

What we believe to be my half-uncle (16% shared DNA | 1,118 cM), has a believed half-sister (1,660cM). My relation to the 'half-sister' is (8% shared DNA | 541 cM) which would most likely make her my ...
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1answer
79 views

Full sibling vs half sibling

Initially one of my full siblings and I received dna results from ancestry.com. which showed that our shared dna is 1752cm, and we were matched under close family - 1st cousin. I was a little ...
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1answer
90 views

DNA half-sibling

My brother did an Ancestry DNA test last year and last week got notification of a new close relative match. The man matches at 1695cM which indicates grandparent/grandchild/uncle/nephew/half-sibling. ...
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1answer
68 views

What is the cut off for a half-sibling and first cousin in CM's?

I am adopted and was searching for my birth family and found a cousin and since then I had someone in the family helping me with the search. I found someone who I think is my half-sibling. She did a ...
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1answer
372 views

Determining if half brother was product of incest

I have worked on my tree through Ancestry.com for many years to include furnishing my DNA. My brother's daughter started a tree through Ancestry and gave her DNA also; the results shows her as my half ...
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1answer
75 views

Understanding half sibling test report

I had requested DNA analysis of my half sibling and have received the results. But unfortunately I am confused with results of the conclusion, meaning the conclusion which is in bold and the sentence ...
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1answer
93 views

1760 cM half sibling or double cousin

My half first cousin and I have a bit of a mystery. We are afraid of the answer, honestly. Some history: his mother and my father are half siblings who share a mother. We do not know who my paternal ...
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1answer
219 views

Half brother Or someone else?

I was given an AncestryDNA test as a Christmas gift and I took the test. I was matched with several people that I didn’t know but I assumed they were people on my dad’s side who I knew absolutely ...
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2answers
104 views

Do father and mother pass on same DNA to half siblings?

I grew up in a household with half siblings. Same mother different fathers. I grew up never knowing who my dad was. As I got older I started to ask questions. My mother would push back with resistance....
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1answer
69 views

Can 1,782 cM shared indicate Half Siblings? [duplicate]

Could a person with 1,782 cM actually be my half-sibling? This person is listed as close family to me, yet I do not know them. My cM is the same as this person's. I do have 6 paternal half ...
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3answers
355 views

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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1answer
163 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 ...
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2answers
161 views

Could DNA matches of 1,591 and 1,773 cM be half siblings of person tested?

I recently received my DNA matches from Ancestry, and I share 1,591 centimorgans across 53 segments with one, and 1,773 centimorgans across 58 segments with another. Could these people be half ...
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3answers
171 views

Half Siblings and DNA Matching

My sister and I are half-siblings. We have always know this and my mother reportedly had an affair during WW2. This was confirmed with ancestry DNA as we only share 1603cM. I'm trying to filter out ...
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1answer
170 views

Understanding shared match of 1,177 cM? [duplicate]

I recently received a "DNA Match" on my account to some one who shows 1,177 cM shared. I am trying to understand what this is really telling me. This is important to me as I do not know who my ...
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0answers
23 views

Does 1,517 shared cM indicate half-siblings? [duplicate]

My husband has a close family match of 1,517cM across 61 segments and his niece shares 906 cM across 40 segments. Is there a chance this is a half brother to my husband and half uncle to his niece? ...
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1answer
94 views

Does sharing 1,249cM indicate half sibling?

My husband was raised by his older half brother. We have been told throughout the years that he is actually my husband father.We ran an ancestry test with his daughter. Results were sharing 1249cm ...
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2answers
240 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 ...
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0answers
128 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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1answer
155 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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1answer
159 views

Is AncestryDNA match of 2,063 cM a half sibling?

I am new to AncestryDNA and my results came back with my top match having 2,063 centimorgans out of 62 segments saying close family. Would this be a half-sibling? The match is a few years older ...
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6answers
11k views

Can Ancestry.com DNA matches be wrong

I (female) had an unexpected half sister match (1,866 cM across 49 segments) in Ancestry.com. We are about the same age so I'm assuming sibling. Upon closer examination I realized my brother(A) was ...
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2answers
1k views

Does 1,366 shared cM indicate half-siblings?

I recently did Ancesty DNA to determine a match between me and a possible half sister. The results came back, and we share 1,366 cM of DNA. As I’ve learned, this is on the low side for half siblings ...
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3answers
727 views

Are 1,053 shared cM likely to be a cousin or a half sibling?

I found a 1st cousin not connected to my mom and my dad was an only child. She has 1053 cM on 40 DNA segments. I have heard people say 1st cousins can also be half-siblings? If she is a first ...
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1answer
10k 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?...
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6answers
44k 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 ...
6
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2answers
2k views

Is this adopted DNA match my niece or half sibling?

The adoptee and I have an autosomal total segment of 2138.8 cM the largest segment is 122.6 cM. The X-DNA is 115 total with the largest segment at 95. My son matched the adoptee with autosomal 1124.1 ...
6
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3answers
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 ...