Help me with your perspective

[Silver]

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.