(Ἀλέξανδρος), son of ANTONIUS, the triumvir, and Cleopatra, queen of Egypt. He and his twin-sister Cleopatra were born B. C. 40. Antonius bestowed on hint the titles of "Helios," and " King of Kings," and called his sister "Selene." He also destined for him, as an independent kingdom, Armenia, and such countries as might yet be conquered between the Euphrates and Indus, and wrote to the senate to have his grants confirmed; but his letter was not suffered to be read in public. (B. C. 34.) After the conquest of Armenia Antonius betrothed Jotape, the daughter of the Median king Artavasdes, to his son Alexander. When Octavianus made himself master of Alexandria, he spared Alexander, but took him and his sister to Rome, to adorn his triumph. They were generously received by Octavia, the wife of Antonius, who educated them with her own children. (Dio Cassius, 49.32, 40, 41, 44, 1. 25, 51.21; Plut. Ant. 36, 54, 87; Liv. Epit. 131, 132.)