RootsChat.Com
General => Ancestral Family Tree DNA Testing => Topic started by: Ellenmai on Friday 19 April 24 17:08 BST (UK)
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I have several DNA matches on Ancestry.com such as 621cM, 265cM, 255cM to name but a few, who I know are descendants from my 2nd Great Grandparents. Yet when I click on the ThruLines 3 of those are showing 0 DNA matches & that I am the currently the only DNA tested descendant connected to this ThruLine. How can this be?
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Thrulines uses other people's trees to find links, not DNA. So will only find a link if you share a common ancestor in a tree, I think...
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If your matches have (reasonably) accurate trees which are linked to their DNA result, they should show up in Thrulines.
(It can be a bit frustrating when you can tell from someone's tree how they are related to you, but Thrulines and the common ancestor feature don't work because their tree is unlinked)
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If your matches have (reasonably) accurate trees which are linked to their DNA result, they should show up in Thrulines.
(It can be a bit frustrating when you can tell from someone's tree how they are related to you, but Thrulines and the common ancestor feature don't work because their tree is unlinked)
There are three necessary conditions for Thrulines to work:
(1) A DNA match
(2) That the DNA match is linked to a family tree
(3) Sufficient details on either your tree and/or your match's tree for Ancestry to deduce a common line of descent.
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Ancestry altered their algorithm last Sept, so now we can have odd Thruline results.
Do take their predictions with a whole bag of salt and Evaluate each and every person in the predicted pathway. Only add each one if you find enough certification and documentation to support their inclusion in your family tree.
I find many errors, many incorrect parentage and even missing generations such that the Mother gave birth well into her 60’s.
Other than as mentioned they can work.
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You also have to have same spelling + dates for the common ancestors to show
If someone has added lots of punctuation or nicknames ..they will look like different people
Suggest using the also known as option & common ancestors tag rather than writing 2nd great grandfather or whatever as a suffix
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Thank you all very much for your replies. I do know three of the relatives who also have the same people on their trees such as a 1st Cousin & have messaged them about this & we are all baffled by it. I had hoped to break down the brick wall to find my Great Grandfather's family, but no match at all there either :-\
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Have you checked that they ( & you )
1) have trees
2)have put themselves not one of their ancestors as home person
3)& Have linked their trees to their DNA results
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Have checked all three as you have suggested Brigidmac & all done :-\
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I ve just helped a relative change her home person to herself and link her results to her tree...thru lines take a few days to appear after changes are made so hopefully we will see results soon .
Good luck .
Btw another.tip is to make sure that everyone has the next generation up on their tree sometimes thru lines don't show to great grandparents but appear thru their parents
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Thrulines.
Evaluate each person presented thoroughly including gathering multiple citations for each person.
One thing to check is for each person presented to Evaluate look at their Parents, then compare those parents with the person presented as the prior generation.
What I find is (I’ll just use male to male for simplicity):-
Our DNA match is Bert.
Tom is listed as Bert’s Father and flagged as Evaluate.
His Father Tom is seen on the family trees used as having a Father called Dick.
We then look at Tom’s Father who is presented as Evaluate is in fact called Harry.
So things are off here.
Harry’s Father in the trees is shown as Bill
Yet again we see Harry’s Father presented to Evaluate as John.
In the trees we see Ted as Harry’s Father.
We can also see a sixty year difference between generations presented as Evaluate.
Hence do not take Thrulines as Gospel more “As loose Guidelines”
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Have you checked that they ( & you )
1) have trees
2)have put themselves not one of their ancestors as home person
3)& Have linked their trees to their DNA results
I don't believe step 2 is necessary.
I control some DNA tests. They are linked to a family tree, but not one I own, and they are not the home person.
Thrulines works just fine for these persons/tests.
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wexflyer
yes i manage other trees+ dna too
so maybe step2 needs rewording as somewhere the person who has tested dna has to be linked to a tree for thru lines to appear .
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Ancestry Thrulines just uses Subscribers Trees to compile the suggested relationship pathway.
At each point where Evaluate is shown on the suggested person the trees used to make the suggestion may or may not be owned by a person who shares DNA with the starting and ending person in the Thruline.
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There are three necessary conditions for Thrulines to work:
(1) A DNA match
(2) That the DNA match is linked to a family tree
(3) Sufficient details on either your tree and/or your match's tree for Ancestry to deduce a common line of descent.
I have a thrulines match to a 5th cousin once removed. He only has one person in his tree (private but presumably himself). I have his 4 x great grandfather in mine (brother of my 3 x great grandmother). I only have name and date and place of baptism for this man, not his marriage or death. I have checked the line suggested by Ancestry and it looks correct. The information that lonks us must have come from other peoples trees as it didn't come from either of ours.
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LizzeL
have a thrulines match to a 5th cousin once removed. He only has one person in his tree (private but presumably himself). I have his 4 x great grandfather in mine (brother of my 3 x great grandmother). I only have name and date and place of baptism for this man, not his marriage or death. I have checked the line suggested by Ancestry and it looks correct. The information that lonks us must have come from other peoples trees as it didn't come from either of ours.
The minimum people in an Ancestry tree is two.
A tree of one does not save hence a tree of two can and is used by Ancestry in creating a Thruline.
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This tree saved somehow. (his name redacted)
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Thanks very much for all your comments, it puts it in a completely different light for me.
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Thru lines are now showing correctly to the person who linked her tree on Sunday
& To a new match
But thru line possibilities have disappeared for one set of my cousin's great grandparents since I altered them last week . He only has 6 great grandparents on the thru line by ancestor parameters
This has happened before but always recalculated after a few days . I wonder why the "new" great grandparents have not shown up yet 😕