Yep, my grandma on my mom's side was born on the res., not sure how she wound up meeting my grandfather. He was half Choctaw and half Irish. Both passed when I was very young. I just got a copy of my mom's tribal card last week, looking to trace my family tree just out of curiosity.
Maybe that's why I have to be so careful with the hard stuff. LOL... I get a little cantankerous sometimes. :)