Most important rule of all, *NEVER* ask any Native what their blood quantum is. That's none of your business and it's a question that will ensure you never get close to that Native or their People. We don't allow that question within our own ranks, and we ****ed sure don't welcome it from people outside our own.
https://www.quora.com/What-are-some-common-faux-pas-when-speaking-to-Native-Americans