Theon of Alexandria, was a Greek scholar and mathematician who lived in Alexandria, Egypt, his daughter was Hypatia, a Greek mathematician, astronomer, inventor, and philosopher in Egypt, then a part of which location?
Theon of Alexandria Theon of Alexandria ( ; Ancient Greek: Θέων ὁ Ἀλεξανδρεύς ; c. AD  335 – c. 405) 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.
Abydos, Egypt Abydos is one of the oldest cities of ancient Egypt, and also of the eighth nome in Upper Egypt, of which it was the capital city. It is located about 11 km west of the Nile at latitude 26° 10' N, near the modern Egyptian towns of el-'Araba el Madfuna and al-Balyana. In the ancient Egyptian language, the city was called Abdju ("ꜣbdw" or "AbDw"). The English name "Abydos" comes from the Greek Ἄβυδος , a name borrowed by Greek geographers from the unrelated city of Abydos on the Hellespont.