William JonesA noted mathematician, published author and early naval navigator. First to use 'Pi' (1706) as a mathematical symbol.
He was a friend of Isaac Newton and Edmund Halley. Father of William Jones the philologist who identified the Indo-European language group which connects many early languages (Sanskrit, Greek, Latin - even Welsh) together.
Connection: Born in Llanfihangel Tre'r Beirdd.
Vice President of the FRS.
Robert Recorde, Noted mathematicians.