Shortly afterwards, Seleucus IV Philopator (187-175 BC) become king of the Seleucid kingdom. Hyrcanus's father Joseph and his uncle, Onias II, also died. The high-priesthood passed to Simon II (219–199 BC). Hyrcanus continued his warfare against the Arabs beyond the Jordan and, in the vicinity of Heshbon, built the castle of Tyre, and ruling the district east of the Jordan for seven years during the reign of Seuleucus IV. Ptolemy V Epiphanes (205-182) also died, leaving two young sons. When Antiochus Epiphanes became king of Syria (175-164 BC), Hyrcanus realized that he would be unable to vindicate himself for his murderous attacks upon the Arabs, he committed suicide, and his property was seized by Antiochus.