This may be a stupid question, but I can't find the answer by just Internet searching and I'm curious. My great-grandpa worked on a Navaho reservation, and we think he was Native American, but it's always been a family conspiracy because he was adopted and I don't think any of his grandchildren cared enough to ask him when he was alive.
Also, I currently live in Oklahoma (I can get a college scholarship if I'm Native American). He and his side of the family lived in Utah, so it's not like he worked for one of the Navaho reservations here.
So if anyone knows the answer to my question, please feel free to tell me! And thank you guys in advance. :)