In a 50000 tear period, I's be surprised if practically all the western world didn't carry some of that DNA.
Irish and Scots have a lot of Viking Blood. As to the pockets in Greece and other places long ago... I'm Scot by ancestry, almost exclusively, and I remember when I studied Celts and Pictish peoples, it was interesting that the Celtic people were never geographically challenged. They were bound as a race by custom and language. they lived spread all over Europe, but lived in pockets. German, English, Scot, Irish, French all have Celtic bloodlines in the mix. Perhaps if some ancient Iberian cultures moved south and spread similarly?
Greece was the center of knowledge at the time, I'm sure anyone living in that time would have visited there.
The other thing is Vikings would breed into lands and people they either colonized, or conquered.
Irish people were kind of swarthy until the Vikings raped looted and pillaged for decades. |