Interesting. R1b and I haplogroups were geographically close, but apparently not chronologically close, and both migrated west into Europe. Again, those migrations were probably several thousand years apart.
Image: Haplogroup_F_%28Y-DNA%29.PNG
The yDNA tests have isolated at least four lines sharing my surname from Devon. It seems four different forebears chose the same (or similar) surnames around 1300. In my case, it means my family is not directly descended from a large, prominent colonial New England family, but comes from the same “neck of the woods” as that family in Devon, England.