They're actually many but I'll just mention 5 for each nationalities.
1. BRITISH MATHEMATICIANS
* John Adair
* John Craig
* James Gregory (or James Gregorie)
* William Jones
* Thomas Rudd
2. ENGLISH MATHEMATICIANS
* Thomas Allen
* Robert Anderson
* John Babington
* Robert Wood
3. FRENCH MATHEMATICIANS
* Pierre Vernier
* Antoine Gombaud
* Jean de Beaugrand
* Marie Crous
* Blaise Pascal
4. ITALIAN MATHEMATICIANS
* Galileo Galilei
* Andrea Argoli
* Bernardino Baldi
* Paolo Casati
* Orazio Grassi
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Rene Decartes.(Pronounced Rin-a DAY-cart)
1678 is a date in the 17th century AD.
the answer to this question is 14 centurys
Rene Descates discovered it in the 17th century
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