Antipater I the Idumaean (born 113 or 114 BCE, died 43 BCE) was the founder of the Herodian Dynasty and father of Herod the Great. According to Josephus, he was the son of Antipas and had formerly held that name. A native of Edom, southeast of Judah between the Dead Sea and the Gulf of Aqaba, which under the Romans came to be known as Idumaea, Antipater became a powerful official under the later Hasmonean kings and subsequently became a client of the Roman general Pompey the Great when Pompey conquered Judah in the name of Roman Republic.