I commend to your attention Fara Dabhoiwala's "A Man of Parts and Learning: Francis Williams Gets His Due", which is about the black Jamaican 18th century polymath and also about how and why you've probably never heard of him (spoiler: virulent racism), and also the gripping detective work involved in figuring out his true story. Recommended.
https://www.lrb.co.uk/the-paper/v46/n22/fara-dabhoiwala/a-man-of-parts-and-learning
and then you can look at Wikipedia: https://en.wikipedia.org/wiki/Francis_Williams_(polymath)
