|Antiochus IX Eusebes|
|Antiochus IX Eusebes Cyzicenus|
|King of the Seleucid Empire |
(King of Syria)
|Reign||116 BC–96 BC (with his brother Antiochus VIII Grypus)|
|Predecessor||Antiochus VIII Grypus|
|Successor||Seleucus VI Epiphanes|
|Issue||Antiochus X Eusebes|
|Father||Antiochus VII Sidetes|
Antiochus IX Eusebes Cyzicenus (Greek: Ἀντίοχος Εὐσεβής Κυζικηνός, "Antiochus the Pious, the Cyzicene") was a ruler of the Hellenistic Seleucid kingdom. He was the son of Antiochus VII Sidetes and Cleopatra Thea. He left the kingdom in 129 BC and went to the city of Cyzicus, but he returned in 116 BC to challenge his half-brother Antiochus VIII for power.
The siblings fought a twenty-year civil war. In 112 BC, Antiochus IX's wife, Cleopatra IV, was killed by her sister Tryphaena, the wife of Antiochus VIII. Tryphaena herself died shortly afterwards. Antiochus VIII was assassinated in 96 BC; he was succeeded by his sons Seleucus VI and Demetrius III. Antiochus IX then took the capital Antioch and married his deceased wife's sister Cleopatra Selene, who was herself the widow of Antiochus VIII. Seleucus VI continued the war against his uncle. Antiochus IX Eusebes Cyzicenus was killed in battle in 96 BC.
The son of Antiochus VII Sidetes and Cleopatra Thea, upon the death of his father in Parthia and his uncle Demetrius II Nicator's return to power (129 BC), his mother sent him to Cyzicus on the Bosporus, thus giving him his nickname.
Antiochus IX Cyzicenus was first married to Cleopatra IV, who was said to have been killed in 112 BC by her sister and rival Tryphaena, wife of King Grypus. After the death of Grypus and Antiochus' capture of the capital, Antiochus married Cleopatra Selene of Syria, the sister of his former wife, Cleopatra IV.
He was subsequently killed in battle by the son of Grypus, Seleucus VI Epiphanes, later in 96 BC.
Antiochus IX probably created the Iturean tetrarchy as an ally against Antiochus VIII. Beginning his reign in 95 BC, Antiochus X Eusebes' first achievement was to defeat his double half-cousin/second cousin Seleucus VI Epiphanes, thus avenging the recent death of his father, Antiochus IX Cyzicenus. The epithets he took tell much of his story: Eusebes (being a title of his father) and also Philopator (father-loving) both honoured his father. After that, he ruled Antioch and its surroundings, fighting endlessly against the four brothers of Seleucus VI, the Nabataeans and the Parthian Empire.
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Antiochus IX CyzicenusBorn: Unknown Died: 96 BC
Antiochus VIII Grypus
| Seleucid King (King of Syria)
with Antiochus VIII Grypus (125–96 BC)
Seleucus VI Epiphanes