This biography tells the story of Theon of Alexandria, a renowned mathematician and philosopher who lived in the 4th century CE. Theon was a major figure in the development of mathematics and science in the ancient world, and his works on geometry, astronomy, and optics were
From Wikipedia
Theon of Alexandria was a Greek scholar and mathematician who lived in Alexandria, Egypt. He edited and arranged Euclid's Elements and wrote commentaries on works by Euclid and Ptolemy. His daughter Hypatia also won fame as a mathematician.