In junior high I knew a girl named Debbie who had some American Indian ‘blood’, but you would not know unless she told you.
Many people thought my mother was an American Indian, but she wasn’t never a member of an American Indian tribe and her parents were born in Western Asia.
Many Hispanics initially think I’m one of them, and it is quite likely that I would be genetically close to some light-skinned Mexicans due to the Muslim conquest of Spain.
My wife does genealogy and can trace one of her roots back through England to Spain and then back to the Prophet Muhammad because of the Muslim conquest of Spain.