the Celts of Central Europe originated from the northern tribes, before their culture mixed with that of the Mediterranean lands and the aboriginal races of what is now Britain. It is well-known that due to difficult access of the remote northern areas (i.e., for the Romans), the Nordic/Saxon cultures retained a greater degree of purity within their customs and language, so this may also be a contributing factor
Hey, thanks for that--I can never remember who did what, or came from where, over there. I think my mind simply lumped them all under the title "invaders", and decided that anything beyond that doesn't really matter.