Right...I read somewhere years ago that the redheaded irish were a direct result of the norse/viking settling Ireland.
As a related aside:
Years ago I had occasion to visit Algeria w/ WHO. Was taken around Algiers by a Berber-Kabyle fellow who had freckles. The Berber gentleman explained that they had people in their ethnic group who had red hair and freckles. Those who had these traits were very proud of them. He explained to me that it was the norse/viking influence from over 1000 years ago.
Back in October, I traveled to England on business to visit our parent company located in the East Riding of Yorkshire, the city of Hull. Beautiful country BTW and the people were extremely nice and friendly even as, although we supposedly speak the same language, I had trouble understanding a lot of them. LOL!
I was amazed how so many of the people in this area of England were blue eyed and blonde. They looked rather more like Scandinavians than what I think of as being typically “English”. But I visited one of the local museums and learned that this area of England had been heavily settled by Vikings. My ancestors evidently “got around”.