Oddly the Dolbear family settled in New London Ct. and the ATWELL family originated from two sites one being near Mortonhapstead. This was the later 1600's and by 1760's the Atwells were all but gone from there in Britain.
I have noticed that families moved in familiar Groups settling in areas together with old familiar names.
In our case there appears to be some inter Mixing with the Mohegan Indians of Uncas. You can see that the Dolbeare family like my own were well represented in the tribe.
http://www.rootsweb.com/~ctcgroto/Mohegan.htm