I saw that there is a folk hero in Finland,called Ahti:
http://en.wikipedia.org/wiki/Ahti
This description of a " fierce sea-going warrior" who was "raiding" do not shows that Ahti was a Viking?
EDIT:
Well it seems my supposition was wrong,there is N1C in British Isles:
http://eng.molgen.org/viewtopic.php?f=82&t=1388
Yes, L550 and L1022, L1022 you will have hard time connecting to anything but Baltic Finns.