Author Topic: Confusing shared matches on Ancestry  (Read 449 times)

Offline Kate_genedetective

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Confusing shared matches on Ancestry
« on: Saturday 06 February 21 23:09 GMT (UK) »
Has anyone else noticed that some shared matches on ancestry are not recipricated?

I have a 4th cousin of my husbands, who we are fairly sure on how they are related (call her cousin A for the sake of augument) and when I look at her shared matches with my husband it comes up with one other match who I don't know with a private tree.
However I found another match - probably another 4th cousin via a different sibling but in the same brance (cousin B lets say) - and when I click on her shared matches, theres Cousin A and afew others.
However cousin B does not come up as a shared match when I am looking at cousin A.....
WHY would this be?
I am pretty sure these two above are 3rd cousins to each other so it would make sense if they were shared matches to each other...
Confused! Any ideas...

Offline Rosinish

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Re: Confusing shared matches on Ancestry
« Reply #1 on: Sunday 07 February 21 01:59 GMT (UK) »
I can't answer your question but from a similar scenario in my own matches, I believe it boils down to the amount of segments from a specific ancestor/line?

The Leeds Method may help you to work out the connection?

https://www.danaleeds.com/dna-color-clustering-the-leeds-method-for-easily-visualizing-matches/

Annie
South Uist, Inverness-shire, Scotland:- Bowie, Campbell, Cumming, Currie

Ireland:- Cullen, Flannigan (Derry), Donahoe/Donaghue (variants) (Cork), McCrate (Tipperary), Mellon, Tol(l)and (Donegal & Tyrone)

Newcastle-on-Tyne/Durham (Northumberland):- Harrison, Jude, Kemp, Lunn, Mellon, Robson, Stirling

Kettering, Northampton:- MacKinnon

Canada:- Callaghan, Cumming, MacPhee

"OLD GENEALOGISTS NEVER DIE - THEY JUST LOSE THEIR CENSUS"

Offline weste

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Re: Confusing shared matches on Ancestry
« Reply #2 on: Sunday 07 February 21 08:46 GMT (UK) »
Shared matches shown are suppose to have 20cms with each other i think


Offline Kate_genedetective

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Re: Confusing shared matches on Ancestry
« Reply #3 on: Sunday 07 February 21 21:41 GMT (UK) »
Thanks for putting the link for the Leeds Method - I had a look at that and its a good way of grouping people into great grandparent groups, I tried it out on my farthers DNA and my aunts.
I think i am going to have a good look at ancestrys DNA help pages and if the answer is not there, then I might email them to ask and clarify if it is segment related.
thanks!

Offline Petros

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Re: Confusing shared matches on Ancestry
« Reply #4 on: Monday 08 February 21 13:02 GMT (UK) »
It is also impacted by Ancestry's cut off.

My cousin and I share a 4th cousin but only my profile is a shared match with our mutual 4th cousin

Offline Kate_genedetective

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Re: Confusing shared matches on Ancestry
« Reply #5 on: Monday 08 February 21 22:03 GMT (UK) »
Hi Petros, is this because you have a higher proportion of DNA matched with the mutual 4th cousin than your cousin?
I do love DNA but it is confusing sometimes...

Offline Petros

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Re: Confusing shared matches on Ancestry
« Reply #6 on: Tuesday 09 February 21 08:56 GMT (UK) »
Hi Petros, is this because you have a higher proportion of DNA matched with the mutual 4th cousin than your cousin?
I do love DNA but it is confusing sometimes...

It would appear so. The 4C1R is a 28 CM match to me but apparently < 20 cM to my cousin.