I.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.