Was just perusing wikipedia and started reading up on the Normans. Apparently they were originally viking raiders who settled in normandy. Their leader was named Rollo. 100 years (or so) later William the first comes along (direct lineage from Rollo) and beats the crap out of the Saxons in England. And of course, the current royal line can trace itself back to William. So, technically, the current royal family is nothing but a bunch of Viking raiders!
Sorry if this is old news to some, but i thought it was fascinating. :p