Ptolemy III Euergetes
Born into a prominent family in the Greek city of Cyrene in modern-day Libya, he was educated in Alexandria, the capital of the Ptolemaic kings of Egypt. After working as a schoolteacher in the city, he came under the patronage of King Ptolemy II Philadelphus and was employed at the Library of Alexandria where he compiled the "Pinakes", a comprehensive catalogue of all Greek literature. He is believed to have lived into the reign of Ptolemy III Euergetes.