He was named after his paternal grandfather Antipater the Idumaean. He and his mother were exiled after Herod divorced her between 43 BC and 40 BC to marry Mariamne I. However, he was recalled following Mariamne's fall in 29 BC and in 13 BC Herod made him his first heir in his will. He retained this position even when Alexander and Aristobulus (Herod's sons by Mariamne) rose in the royal succession in 12 BC, and even became exclusive successor to the throne after their execution in 7 BC (with Herod II in second place).