To identify current family members by location, genealogy and genetic distribution.
We have a relatively rare surname which should allow us to track family and genetic family
migrations. We have a starting location for at least 2 English family groups and then
a large number of puzzles such as,

Are Scots and Irish Battersbys' related to The English Battersbys' or instead
from another "Bothvarrs farm"  destroyed at the time the Irish pushed the Norse
out of Dublin and Waterford or the Scots pushing the Norse out of Western Scotland.

What migration routes did the family groups take and if possible why and when.
There is strong evidence for early migration,
In Dublin at the time of Elizabeth I
In the US in the early (13 states) period.

I will be trying to match Y-DNA similarities between members,
and using autosomnal and MT-DNA results(from those that wish to share this information)
as reference material to see if this sheds any further light on family migration.