The young son of Alexander Balas & Cleopatra Thea was returned from Arabia by his father's opportunistic general, Trypho. As the child-king's guardian, Trypho ruled in his stead for little more than two years, before arranging his assassination.

References: Josephus, Antiquities 13.131, 144-150, 187, 218-219.
                  Appian, Syrian Wars 68.

Other online resources:

• Antiochus VI Dionysus - Jona Lendering chronicles events & lists primary resources [Livius: Articles on Ancient History].

• Antiochus VI - article by Louis Ginzberg article in The Jewish Encyclopedia.

• Antiochus VI Dionysus - in Wikipedia's web.