DNA match to 3rd great grandfathers brother

[themonkeymonkey]

Thank you Heb66, so it's very possible that I would be matched with the brothers family .

[Biggles50]

Thanks for clarifying.

Your DNA match descends from your 3xGreat Grandfather’s Brother so the first common ancestors that you share with your 261.6cM match is with your 4x Great Grandparents and this would equate to about a 4 or 5C where the cM would typically be about 30 cM.

The much higher cM of your DNA match and your knowledge would suggest that there are other links to your match that you are not aware of.

261.6 cM does have a high probability of a 2C relationship.

Further research is prudent.

[themonkeymonkey]

Thank you Biggles50, I am going to see where else the lineage may connect, seems I have a lot of researching to do, many thanks.

[Ruskie]

If I’ve got this right …

The 261.6cM match with third great grandfather’s brother’s descendant, but no direct matches to third great grandfather, could simply mean that no direct descendants of your third great grandfather have taken a DNA test.

Not sure if that makes sense or is relevant to your query. 

[themonkeymonkey]

Thank you Ruskie, I am hoping that new DNA matches come along and i can work it all out....hopefully.

[Biggles50]

You could also look at any Shared Matches and if necessary build trees around them

[themonkeymonkey]

Good idea Biggles50 I have started a seperate tree and will see if/where we combine together.

[Biggles50]

It may take some time and can become a waiting game.

As I have explained in other threads, I have a 364cM match who is set as the home person and whose tree now has 600 people and there are 13 other DNA shared matches with me linked into them.  I believe there is an NPE in my tree but not sure where that is and the tree has sat there for two years with me periodically going back to check on hints and revisit the data.

Do also read up on Endogamy and how it can interact with DNA trees.

You could also use DNA Painter’s WATO tool to give you some percentage probabilities as to the who and where in the tree