I’m familiar with that legend. And most of the folks north of the Danube we think were from Scandinavia. Genetic DNA advancements are getting us there with archeological finds. My guess is that almost any mythology has a core root of some truth in it.
More then people think.
It is fashionable, and has been for some time, to think that our ancestors had nothing better to do then sit down and using a very complicated system of writing and very sub par recording mediums and make up outright lies for the very tiny percentage of people who could read to enjoy.
I tend more to believe that written records are fairly accurate and that oral history is at least as accurate on average as our current documentaries. Some things added, compressed or left out for dramas sake but mostly real.
Not a popular belief at the moment.