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Ancestral Family Tree DNA Testing / Advice on mystery DNA please.
« on: Saturday 28 June 25 15:11 BST (UK) »
Hi all.
Just after some advice on narrowing down an unknown grandparent through DNA......
My dad did a DNA test. Both parents known. Both maternal grandparents known. Only paternal grandmother known. Paternal grandfather UNKNOWN.
His ancestry results have many matches and I have allocated each match to the correct family line where possible based on written records and shared matches.
When looking at the matches that had no known links to the three known grandparents (and using the Leeds method) I was able to isolate numerous matches belonging to the mystery grandparent. Looking at their trees and connections I was then able to work out that the mystery grandparent is a descendant of two couples.
The first couple is F1 and M1 and the second couple is F2 and M2.
It is clear that my dad is a descendant of these four people as there are shared matches on all four sides. None of these four have and shared DNA with the known paternal grandmother.
I have the names of F&M1 and F&M2. I have all know children and birth years for these four people. But the problem is with the timeframe. My dad's father was born in 1924 to his mother and mystery father. Mother was born in 1903, so working on assumption mystery father was born around 1903 or prior.
F&M1 married in 1878 and had children between 1884-1894. No confirmation there are any older children, but that is a 6 year gap!!
F&M2 married in 1883 and had children between 1883-1901.
I am working on assumption that a child from couple 1 and a child from couple 2 have had a child together quite young (which is my dad's mystery grandfather).
BUT - dad has one match showing as a 2nd cousin who also has the same shared matches to couple 1 and couple 2. Her tree does not have any information that connects any of these people and has different names too. My suspicion is there might be an adoption or two on her side which accounts for the difference.
I have contacted the match, but she is not overly helpful at all. She does not feel there is any connection and seems to have overlooked what DNA evidence shows.
My questions:
Can anyone think of a different plausible scenario?
Would a Y-chromosone test be helpful? I am under the assumption that doing one will give me a surname that should match to either couple 1 or couple 2. If this is the case it would help me establish who had the baby (mystery grandfather).
If dad does a Y-chromosone test - can anyone recommend which one will give the surname I am after.
Thanks, Katharine.
Just after some advice on narrowing down an unknown grandparent through DNA......
My dad did a DNA test. Both parents known. Both maternal grandparents known. Only paternal grandmother known. Paternal grandfather UNKNOWN.
His ancestry results have many matches and I have allocated each match to the correct family line where possible based on written records and shared matches.
When looking at the matches that had no known links to the three known grandparents (and using the Leeds method) I was able to isolate numerous matches belonging to the mystery grandparent. Looking at their trees and connections I was then able to work out that the mystery grandparent is a descendant of two couples.
The first couple is F1 and M1 and the second couple is F2 and M2.
It is clear that my dad is a descendant of these four people as there are shared matches on all four sides. None of these four have and shared DNA with the known paternal grandmother.
I have the names of F&M1 and F&M2. I have all know children and birth years for these four people. But the problem is with the timeframe. My dad's father was born in 1924 to his mother and mystery father. Mother was born in 1903, so working on assumption mystery father was born around 1903 or prior.
F&M1 married in 1878 and had children between 1884-1894. No confirmation there are any older children, but that is a 6 year gap!!
F&M2 married in 1883 and had children between 1883-1901.
I am working on assumption that a child from couple 1 and a child from couple 2 have had a child together quite young (which is my dad's mystery grandfather).
BUT - dad has one match showing as a 2nd cousin who also has the same shared matches to couple 1 and couple 2. Her tree does not have any information that connects any of these people and has different names too. My suspicion is there might be an adoption or two on her side which accounts for the difference.
I have contacted the match, but she is not overly helpful at all. She does not feel there is any connection and seems to have overlooked what DNA evidence shows.
My questions:
Can anyone think of a different plausible scenario?
Would a Y-chromosone test be helpful? I am under the assumption that doing one will give me a surname that should match to either couple 1 or couple 2. If this is the case it would help me establish who had the baby (mystery grandfather).
If dad does a Y-chromosone test - can anyone recommend which one will give the surname I am after.
Thanks, Katharine.
