http://en.wikipedia.org/wiki/Mithridates_II_of_Commagene

Mithridates II Antiochus Epiphanes Philorhomaios Philhellenos Monocritis, also known as Mithridates II of Commagene (Greek: Μιθριδάτης Ἀντίοχος ὀ Ἐπιφανής Φιλορωμαίος Φιλέλλην Μονοκρίτης, died 20 BC) was a man of Armenian[1] and Greek descent who lived in the 1st century BC. He was a prince of Commagene and one of the sons of King Antiochus I Theos of Commagene and Queen Isias of Commagene. When his father died in 38 BC, he succeeded his father and reigned until his death.

According to Plutarch, he was an ally to Roman Triumvir Mark Antony, and in 31 BC Mithridates personally led his forces to Actium in Greece in support of Antony in the war against Octavian, the future Roman Emperor Augustus. After the defeat of Antony however, Mithridates became a loyal ally to Augustus. Nevertheless, Augustus forced Mithridates to hand over to the Roman province of Syria, a village in Commagene called Zeugma, which was a major crossing point of the Euphrates River. To show his support for Augustus, Mithridates dropped the title Philhellen ("friend of the Greeks") from his Aulic titulature and adopted the title Philorhomaios ("friend of the Romans") instead. Both titles were derived from the Royal Commagenean cult that Mithridates' late father had founded, and in which Mithridates played an important role. His other title Monocritis is an otherwise unattested title and was most likely a judicial function within the Royal Administration and a sign of his high social standing.

Mithridates also had a brother, Antiochus II of Commagene, who was also a prince of the kingdom. In 29 BC, his brother Antiochus II was summoned to Rome and executed by Roman Emperor Augustus, because Antiochus had caused the assassination of an ambassador whom Mithridates had sent to Rome.

According to an inscription on a funerary altar found in the Turkish village of Sofraz of a local wealthy leading family, which dates around the mid-1st century, the wife of Mithridates was a Greek woman called Laodice. The altar inscribes family members that stretch over 7 generations and includes the names of Mithridates, of his father and of his wife. When he died in 20 BC, his son with Laodice, Mithridates III of Commagene, succeeded him.

http://en.wikipedia.org/wiki/Mithridates_III_of_Commagene

Mithridates III Antiochus Epiphanes (Greek: Μιθριδάτης Ἀντίοχος ὀ Ἐπιφανής, fl. 1st century BC) was a King from the of Kingdom of Commagene. The son and successor of King Mithridates II of Commagene and Queen Laodice, he was of Armenian[1] and Greek descent. Mithridates sometime after 30 BC, had married his paternal cousin Iotapa, a Princess of Media and daughter of Artavasdes I of Media Atropatene. Iotapa had borne Mithridates a son, Antiochus III of Commagene, and a daughter, Iotapa, who married King Sampsiceramus II of Emesa (modern Homs, Syria). When Mithridates’ father died in 20 BC, he succeeded his father. He reigned as king between 20 BC-12 BC. Very little is known on his life and his reign as King. When he died in 12 BC, Antiochus III of Commagene became king. Antiochus III ruled with another sister called Iotapa whom he married.

Mithridates III of Commagene

Mithridates III Antiochus Epiphanes (Greek: Μιθριδάτης Ἀντίοχος ὀ Ἐπιφανής, flourished 1st century BC) was a prince who served as a King of Commagene.

Biography

Mithridates III was the son and successor of King Mithridates II of Commagene and Queen Laodice. He was of Armenian and Greek descent.

Mithridates III, sometime after 30 BC, had married his paternal cousin Iotapa, a Princess of Media Atropatene who was a daughter of Artavasdes I of Media Atropatene and his wife, Athenais.

Iotapa bore Mithridates III one daughter, Aka II of Commagene; one son called Antiochus III and two daughters both called Iotapa. One daughter called Iotapa married King Sampsiceramus II of Emesa, Syria and the another Iotapa, later married and ruled with her brother Antiochus III.

When Mithridates III’s father died in 20 BC, he succeeded his father. He reigned as king between 20-12 BC. Very little is known on his life and his reign. When he died in 12 BC, Antiochus III of Commagene became King.

Source :

https://en.wikipedia.org/wiki/Mithridates_III_of_Commagene