DNA match but no relationship?

[Phoenix]

I share over 50cM with someone on Ancestry. Sib shares 62cM with them, and a cousin over 30cM. It all points to my great great grandparents also being their ancestors.
However, my family have Wiltshire and Surrey roots. They have links on each side of that divide. But, their family is firmly based in Durham.

This of course could be a NPE, though I'm struggling to find anyone heading to Durham amongst my second cousins.

We share four segments. Is there any possibility that this is a coincidence?

[Olde Crone]

Servants. I was astonished to find how far humble servants went to work away, hundreds of miles from home.

OC

[kiterunner]

That much shared DNA on Ancestry won't be a false match.

[Phoenix]

Thanks Kite
I think that both of us are finding it hard to get our heads around what this might mean

[Glen TK]

An NPE event suggests a half relationship & that can really throw the cM figures out when you aren't used to them. I've got so many I don't deal with full relationship figures very often!

[Phoenix]

I have a Janet and John family. My new cousin's mother was an unwanted war baby.
Clearly a male in my family is part of the solution, but I wonder whether there is more than one NPE, as the only person so far in my family who I have found that might be the link was safely esconced in deepest rural Surrey from 1893, and dead by 1940.

[marquette]

My great-great grandmother had only one brother who never married and has never been accounted to have any children. I have had a group of 5 DNA matches who all trace back to one family (two siblings) but no paper-trail link to our family.

The shared DNA and the family tree suggest the best possibility for a connection is an NPE with great-great uncle as the father. Well, the matches' gg father was 29 years older than the wife and would have been in his 70s when the two children appeared in his family, who lived close to where our family lived.

Now I have found a will for gg uncle, but its not on-line, so I am off to the Archives to have a look at it! Please, please let it mention his NPE family !!