Low cM matches that were deleted by Ancestry

[Janethepain]

Biggles,

Your point is no doubt accurate, I certainly would not argue with that, but....  I also have a 6cm match that is  a 3rd cousin 1 times removed, and a 7 cM match that is 3rd cousin 2 x removed  and other  7 & 8cM matches in that vein, with two 8cM matchs who are 3rd cousin 1x removed for example.

So, maybe I am very unusual , I guess??  These are plucked from my common ancestors list.

[brigidmac]

Jane it would make you unusual are you sure neither of you are descended from.half siblings somewhere along the line being half second cousins twice removed is more likely

Or someone passing off a grandchild as child so you could actually be 3 x removed

Hard to prove or disprove
* I take that back. it could be proved if other full cousins had a much.higher cm range for same relation
I do have a 3c1r who only matches me by 10cm and my cousin by 19cm and as far as Im aware the common ancestors are same married couple

[midlandslass]

All down to the randomness of DNA distribution.
My s-i-l has a 2nd cousin who she shares 252cm with.
My son shares a mere 13cm as their 2C1R.
Son and s-i-l share 1974cm.

[guest189040]

Biggles,

Your point is no doubt accurate, I certainly would not argue with that, but....  I also have a 6cm match that is  a 3rd cousin 1 times removed, and a 7 cM match that is 3rd cousin 2 x removed  and other  7 & 8cM matches in that vein, with two 8cM matchs who are 3rd cousin 1x removed for example.

So, maybe I am very unusual , I guess??  These are plucked from my common ancestors list.

Anything is possible, it is down to probabilities which in turn effects the potential work you have to put in to link a match.

My 364 cM match is my major headache (there is a thread about it) and no matter what I do I cannot so far make the link despite her being in the 1-2C DNA ballpark which accounts for 98% of the probabilities.  Hence as Brigidmac suggests full Cousin DNA mapping can help, I am trying to get a trio of my own Cousins to do the test to help solve our conundrum.

[Janethepain]

Interestingly, my original example, the 6cm, 2nd cousin 2 times removed,where the young lad's grandfather is my 2nd cousin, well the grandfather is also a match for me,he matches me at 182cM, which would be, according to DNA painter, 38% likelyhood of being my second cousin. His grandson has been checked in the records, and manages his GF's results. He talks about his granda, and I have no doubt that is his relationship. Although I dont know either of them personally, the grandfathers mother was a very close friend of my mother, being 1st cousins. We are from a very close, of irish origin family group, in Scotland, and I have very many matches in that part of my family tree.