Tractor,
I believe that these bow types were named for the nearest town/ location where they were foung....These two are both in Denmark....nodoby has stuck a name to the short bow found in Sweden recently (not yet that I know of).
The boarders of Scandanavia were not like they are now...basically the "Vikings" were all lumped together (like when the white guys couldn't keep the Native Americans straight) But it is my understanding that some of the Danes, Norwiegan, and some of the Swedes were "southern or western Vikings (they went south and west (England, New World, Iceland etc.) And some of the Swedes and Northern Norweigans went east (called Rus) and settled in what's now Russia and were in contact with people all the way to the eurasian steps, constantanople etc.
I understand that the "Vikings" themselves were divided by aleigences to various warlords and kings more than geography.