Pythagoras

c. 582-c. 507 B.C.E. A Greek cosmologist who believed that numbers described the true nature of the universe. A very influential teacher, about whom many legend were written and later attatched to Jesus in the New Testament.
It is uncertain why the Pythagorean theorem is so named; it was neither Pythagoras nor his followers who discovered or even proved the rule, nor were they even particularly concerned with it in any way.