My daughter-in-law's mother was adopted and she died when my DIL was very young, so we know very little of her background. Her adoptive parents came up with an interesting, but completely untrue, back story regarding her birth and adoption, which I have unravelled by tracing her mother (my DIL's grandmother) through adoption records, but the father's name is unknown. She was born in 1945, so an overseas serviceman can't be ruled out.
Through DNA we now have have over 6500 maternal matches to my DIL, most of which can be proven to be of her grandmother's family. Unassigned matches are easy to assign to the maternal or paternal lines because my DIL's father was Indian and her mother was white British, so I've been through all of the hign cM matches and manually assigned them. She also has a half brother whose father is also white British and appears as a 1776 cM match.
Of the five >100 cM matches on my DIL's maternal side only one (at 101 cM) does not share any matches with any of the others at any cM level. This person also shares DNA with my DIL's brother and two others, but the three have no DNA links to any other maternal matches and I don't recognise any of the names on any of the three's (very limited) trees.
The other >100 cM maternal matches are 262, 132, 112 and 103 cM. All of those four can be linked to each other through DNA.
Does this indicate with any degree of confidence that the 101 cM match is related to my DIL's missing maternal grandfather? I should add that all three have links to the Manchester area where my DIL's mother was born.
