Philip the Tetrarch (c. 26 BCE – 34 CE), was the son of Herod the Great and his fifth wife, Cleopatra of Jerusalem. As a tetrarch, i.e. ruler over one of the four unequal parts into which his father's kingdom was divided, namely the northeastern one, he maintained his rule from Herod's death in 4 BCE until his own in 34 CE. This arrangement is known as the Herodian tetrarchy, all four heirs remaining client rulers of Rome, like Herod himself. The other three were his half-brothers Herod Antipas and Herod Archelaus, and his aunt Salome I. He is not the same person as Herod the Younger, whom some writers call Herod Philip I. To distinguish the two, he is called Herod Philip II by some writers (see "Naming convention").