The average Mexican is genetically 50% indigenous with evidence of native ancestry being significantly higher on the X chromosome.
75% of people enrolled in the Cherokee Nation have less than 25% Cherokee ancestry. Bill Baker, the former Principal Chief of the Cherokee Nation, was found to only have 3% Cherokee ancestry.
Whoopi Goldberg’s real name is Caryn Johnson. She has claimed Jewish ancestry, despite research showing no known Jewish ancestors. The Jewish Chronicle related an account of the name change where Whoopi’s mother thought her birth name was “not Jewish enough” for her to become a star.
Sarah Jessica Parker, who played a witch convicted in the Salem witch trials in the Disney movie “Hocus Pocus”, later discovered that one of her ancestors was a real woman accused of witchcraft during the Salem witch trials.
Johnny Cash released a whole album called “Bitter Tears: Ballads of the American Indian” because Cash had been convinced that his ancestry was Cherokee, even by members of the Cherokee tribe. Later he found it he was not Cherokee at all, but Scottish, English and Scots-Irish.
If you are Jewish and can trace your ancestry back to the Spanish Inquisition (1492), you qualify today for Spanish citizenship.