I know this sounds crazy, and I'm 99% sure it is crazy and made up, but I remember reading a long time ago on some website that some Native Americans in Alaska or western Canada remember being driven out of Siberia by the Mongols, particularly by Ghengis,
I'm sure the story is not true but is there some weird source for this story that led somebody to interpret it this way? Do any First Nations have legends about their ethnogenesis that are loosely about fleeing from a tyrant or an army to their curremt homeland? How about people in the far, northeast of Siberia? Are there any famous archaeologists or historians or anthropologists you can think of who came up with this claim?
Nope, sorry friend. The Bering Land bridge disappeared around 10'000 years ago. I dont know how Native Americans in Alaska could remember being driven out by Mongolians some 500 years ago, since Europeans didnt come in contact with Western native tribes till the late 1600s. Again, as you stated it was probably a similar myth/origin story of them being pushed out of their homeland by large men on horses.
Well, the Yakuts did migrate from one end of Siberia to the other because of Mongol expansion. Just to add on to OP's question - I am curious too - are there First Nation myths about being chased by horsemen? If so, what are the modern interpretations for them?