Im form Mexico and i used to work at my collage library, there was some book (forgoth the name but will look later if you want) that mentioned some similar concept about toltect and mayan culture in the pre colonial era, and despite not like each other tribes in the whole american continect some of them share certain social norms such as the two spirit, zapotects call it "muxhe" but it was kinda the same thing.

it always bring good result lookin things form another language, like if you want to get into Buddhism you better have a good thai translator instead of looking english books in the subject.