It is not named after a person. π (spoken as pie) is a letter of the Greek alphabet.
Pi was invented by William Jones in 1706 who was a Welsh mathematician.
Archimedes
Pi
English mathematician William Jones developed the symbol for Pi in 1706.William Jones
Archimedes was the first Western mathematician to make a serious attempt at calculating the value of pi. His estimated, that pi was between 3.1408 and 3.1429.
Pythagorus.
Pi was first computed by the Greek philosopher and mathematician Archimedes.
that pi is irrational
archimedes a famous greek inventor invented pi
aryabhata
lindemmann
brahmagupta