EUCLID

Euclid was a Greek mathematician, often referred to as the "Father of geometry".

He was born in Athens but he was active in Alexandria during the reign of Ptolemy I.

His Elements is one of the most influential works in the history of mathematics. In the Elements, Euclid deduced the principles of what is now called Euclidean geometry from a small set of axioms. Euclid also wrote works on perspective, conic sections, spherical geometry, number theory and rigor.

Euclid is the anglicized version of the Greek name Εὐκλείδης, meaning "Good Glory"