A lot of Caribbean folk were presumed to have partial black ancestry, because planters recognized their kids by slave mothers, but also because poor white indentured servants intermarried with black slaves and freemen.
Hamilton might indeed have these in his ancestry.
Napoleon had a black general, father of Dumas Sr. And grand father of Dumas Jr. The Count of Monte Cristo was partly inspired by his life.
Napoleon’s wife Josephine was also rumored to have black ancestry.
British colonies had more prejudice, but still one saw hints of Creole mixing being accepted.
One patriot who died at Bunker Hill was a “person of colour”.
In Last of the Mohican's, the book, the older “dark” daughter had a Creole mother.
And of course, in Jane Eyre, the hidden wife was from the west Indies, and the hint is that is why she is crazy.
I'm reading the thread backwards. I don't believe there's any evidence of that, her parents were clearly known. But coming from Martinique, she had the aura of being creole, French creole I guess, which arriving in France was an asset in the Court. For an attractive young lady. Attached to a very politically prominent sugar daddy whose name I've forgotten, she marries an artilleryman. Go figure. A fascinating lady, I believe her descendents sit on the thrones of four or five European nations today.