Herod Archelaus (Ancient Greek: Ἡρῴδης Ἀρχέλαος, Hērōidēs Archelaos; 23 BC – c. AD 18) was the ethnarch of Samaria, Judea, and Idumea, including the cities Caesarea and Jaffa, for nine years (c. 4 BC to AD 6). As a ruler, he was part of what's known as the Herodian tetrarchy, created after the death of Herod the Great. Herod Archelaus was the son of Herod the Great and Malthace the Samaritan, brother of Herod Antipas, and half-brother of Herod II. Archelaus (a name meaning "leading the people") came to power after the death of his father Herod the Great in 4 BC, and ruled over one-half of the territorial dominion of his father. Archelaus was removed by the Roman emperor Augustus when Judaea province was formed under direct Roman rule, at the time of the Census of Quirinius.
General info from Wikipedia.org