This is one of the best all around sites that I have found. It is titled “The MacTutor History of Mathematics Archive.”
http://www-history.mcs.st-and.ac.uk/~history
This is an award-winning site that links to all sorts of mathematics information.
https://mathshistory.st-andrews.ac.uk/HistTopics/History_overview
The History of the Decimal Point table mentions the following people, and here are some links in order to find out more about them.
Stevin:
https://mathshistory.st-andrews.ac.uk/Biographies/Stevin
Viète:
https://mathshistory.st-andrews.ac.uk/Biographies/Viete
Kepler:
https://mathshistory.st-andrews.ac.uk/Biographies/Kepler
Napier:
https://mathshistory.st-andrews.ac.uk/Biographies/Napier
Oughtred:
https://mathshistory.st-andrews.ac.uk/Biographies/Oughtred
Ozanam:
https://mathshistory.st-andrews.ac.uk/Biographies/Ozanam