How do you go about finding out if they were registered? My grandpap is 1/2 Cherokee my mom is a 1/4. His dad is full ilitain. Which makes me believe my grand papa mom had to be full or her mom full in order for my grandpap to be half right? Anyway I can't find info on her and nobody seems to know she were Indian except her best friend which is my step grandma and she doesn't know much. She said she does remember her saying that her mom is Native American. I'm just wondering why others didn't see to know that.