I think people will still use Celtic because they aren't aware of genetics. The average man in the street will still use Celtic for Irish, Scots and...
Interestingly the Dutch were very Insular Celtic like in the Iron Age so very Bell Beaker. R1b-L21 came with the Bell Beakers well before the Celts....
I see a problem with this, that would be there are 4 Northern components that are practically the same.(North Atlantic N-NW/Baltic Sea W/North Sea S...