Fascinating, and thanks. Curious if there’s any identifiable lineage.
I don’t think so. The Vikings in North America probably made the same mistake the British and French made later on, thinking a similar latitude as “home” would have a similar climate. Big mistake.
Also, the Vikings in Newfoundland discovered only extremely hostile and aggressive natives. There was no chance to really leave any progeny. All the Vikings left, or died, as far as is known. If a few Vikings “went native” they would not have left a discernable DNA footprint.
But if Vikings had sailed further south, say to Long Island or the Chesapeake Bay, history could have been radically changed with the introduction of iron making, the wheel, and the horse into North America 500 years before Columbus.