I'm blond (or was, grey now) and blue eyed. My Dad's father came from the island of Mon in Denmark. His mother's parents were from N. Germany. He was blond and blue eyed as a kid but as a adult his hair darkened to black. My mom was a red head with brown eyes--her ancestors were all Palatine Germans. My brother has brown hair and eyes. My two daughters are blue-eyed blonds. Wife is of Norwegian/English ancestry--blond, green eyes
Vikings gave rise to the Russ--which became Russians--the Normans(Northmen)--which were Dutch, French then English--raped and conquered most of Ireland, Scotland and Britain--took control of Sicily and S. Italy--served as mercenaries for the Turks in Persia and the Egyptians in what is now Libya and Tunisia. In the meantime they imported a lot of Europeans back into Scandinavia as slaves. That spread a lot of blue eyes and Dupuytren's constricture around the world. They actually got to N. America but that didn't work out too good for them procreation-wise.