Sure, King Arthue I and King Arthur II.
Uh, KA1 was 4th century; KA2 was 6th century. From the Madoc piece:
We know that "King Arthur" was, in fact, two people, which clears up the confusion of Polydore Vergil, historian at the Court of Henry VIII, relating to how "King Arthur" could defeat the Romans and also the Angles, the Saxons and others. "Arthur" would have been 250 years old. We know now, thanks to our King Arthur Research Project, that Arthur I was son of Magnus Maximus and led the British armies into Gaul in 383, defeated the Romans at Sassy-Soissons and chased the Roman Emperor Gratian to Lyons, where he executed him.
Arthur II, son of King Meurig, and a sixth generation direct male descendant of Arthur I, is the Sixth Century Arthur of legend.
For all the world it appears KA2 not only survived the meteor/comet impact, but traveled to the new world with Madoc. Assuming of course there's sufficient evidence for any of this...
FGS