Help me with your perspective

[Aegon]

40 chapters into the novel, the main character is slowly, throughout, revealed to be the last born Native American.

However, the catch is that he was born in Sweden after his family fled America.

I wonder, how does he remain Native American if he wasn't born in America? Does this mean he's just indigenous?

Up to this point, I've been getting by with referring to him as the last of his tribe.

Replace "Native American" with "Jewish" and it may click in your head. It's an ethnicity and genetics thing, not a matter of where you were literally born. Although in this context it makes more sense to say the specific tribe than just "Native American," but I feel like it doesn't make a difference anyway because that tribe would still be the last Native American tribe in existence too.