As heir presumptive to the throne by right of descent on his mother's side, he was sent to Rome for his education in the year 23 BC. He remained there in the household of Asinius Pollio until about the year 17 BC, when Herod himself brought him and his younger brother Aristobulus, who had been with him, home to Jerusalem. Shortly afterward Alexander received in marriage the Cappadocian Princess Glaphyra, the daughter of King Archelaus of Cappadocia.