Re: Many mysteries
True. I was always told that my dad's family emigrated from Scotland to Kentucky. Which they did. But my DNA test came out 40% Norwegian. Seems the Vikings got around as well. And there's a smidge of Middle Eastern, as Mum's Italian ancestors were traders from Smyrna, and apparently there were some locals mixed in.
We are all immigrants, it's just how far back you need to look. And I'd argue that the blending of cultures makes us (USAians, but others as well) a richer nation.