The Herodian Dynasty was a Judean dynasty of Idumaean/Edomite descent. The Herodian dynasty began with Herod the Great, who assumed the throne of Judea, with Roman support, bringing down the century long Hasmonean Kingdom. His kingdom lasted until his death in 4 BCE, when it was divided between his sons as a Tetrarchy, which lasted for about 10 years. Most of those kingdoms, including Judea proper, were incorporated into Judaea Province in 6 CE, though limited Herodian kingship continued in Northern Levant until 92, when the last Herodian monarch, Agrippa II, died and Rome assumed full power over his domain.
During the time of the Hasmonean ruler John Hyrcanus (134–104 BCE), Judea conquered Edom (Idumea) and forced the Edomites to convert to Judaism.
The Edomites were gradually integrated into the Judean nation, and some of them reached high-ranking positions. In the days of Alexander Jannaeus, Edomite Antipas, was appointed governor of Edom. His son Antipater, father of Herod the Great, was the chief adviser to Hasmonean Hyrcanus II and managed to establish a good relationship with the Roman Republic, who at that time (63 BCE) extended their influence over the region, following conquest of Syria and intervention in a civil war in Judea.
Julius Caesar appointed Antipater to be procurator of Judea in 47 BCE and he appointed his sons Phasael and Herod to be governors of Jerusalem and Galilee respectively. Antipater was murdered in 43 BCE; however, his sons managed to hold the reins of power and were elevated to the rank of tetrarchs in 41 BCE by Mark Anthony.