Phĭlădelphus, i, m., = Φιλάδελφος (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.