Philadelphus, called Ptolomeus, King of Aegipt, who made a Librarie wherein were fiftie thousande bookes. Hee also caused the 5 bookes of Moyses to be trãslated into Greeke, by Ixxii. interpreters doctors of the Iewes.
Lewis and Short: Latin dictionary
Phĭlădelphus, i, m., = *fila/delfos (loving one's brother or sister), a Grecian and Roman surname.I. Ptolemaeus Philadelphus, a king of Egypt, Plin. 36, 7, 14, 67; Gell. 6, 17, 3.—II. Annius Philadelphus, Cic. Phil. 13, 12, 26.—III. Philadelphus, a slave of Atticus, Cic. Att. 1, 11, 2: L. CALPVRNIVS L. L. PHILADELPHVS, Inscr. Maff. Mus. Veron. 274, 9.