Heard this AM on Boston TV that a local geneologist discovered that her great great great grandmother was an Indian. This makes her 1/64 (?). Don’t know if this qualifies.
The real problem is that her claim mattered at all to her employment opportunities.
If I go back far enough I am related to King Richard the Lionheart from his travels during the Crusades, and I would bet my claim is more solid than Warren’s. I wonder if I could get knighted.