John Hyrcanus (; Yōḥānān Hurqanōs; ) was a Hasmonean (Maccabean) leader and Jewish high priest of the 2nd century BCE (born 164 BCE, reigned from 134 BCE until his death in 104 BCE). In rabbinic literature he is often referred to as Yoḥanan Cohen Gadol (), "John the High Priest". Name Josephus explains in The Jewish War that John was also known as "Hyrcanus", but does not explain the reason behind this name. The only other primary source, the Books of the Maccabees, never used this name with respect to John. The single occurrence of the name Hyrcanus in 2 Maccabees 3:11 refers to a man to whom some of the money in the Temple belonged during the c. 178 BCE visit of Heliodorus. The reason for the name is disputed amongst biblical scholars, with a variety of reasons proposed: Familial origin in the region of Hyrcania on the Caspian Sea A Greek regnal name, which would have represented closer ties with the Hellenistic culture against which the Maccabees had revolted under Seleucid rule. However, the region of Hyrcania had been conquered by Mithridates I of Parthia in 141–139 BCE Given the name by the Seleucids after he fought in the region alongside Antiochus VII Sidetes against Phraates II of Parthia in 130–129 BCE, a campaign which resulted in the release of Antiochus' brother Demetrius II Nicator from captivity in Hyrcania Life and work He was the son of Simon Thassi and hence the nephew of Judas Maccabaeus, Jonathan Apphus and their siblings, whose story is told in the deuterocanonical books of 1 Maccabees and 2 Maccabees, in the Talmud, and in Josephus. John was not present at a banquet at which his father and his two brothers were murdered, by John's brother-in-law, Ptolemy, son of Abubus. He attained to his father's former offices, that of high priest and ethnarch (national leader)—but not king. Josephus said that John Hyrcanus had five sons but named only four in his histories: Judah Aristobulus I, Antigonus I, Alexander Jannai, and Absalom. It is this fifth brother who is said to have unsuccessfully sought the throne at the death of Aristobulus I. Some sources name his fifth son Hezekiah, and make him father of Judas, grandfather of Eucharis of Magdala. Siege of Jerusalem During the first year of John Hyrcanus's reign, he faced a serious challenge to independent Judean rule from the Seleucid Empire.