His father Anak, head of the Parthian clan of Suren, was bribed about the time of his birth (c. 257) by the Sassanid king of Persia to assassinate the Armenian king, Chosroes, who was of the old Arsacid dynasty, and father of Tiridates or Trdat, first Christian king of Armenia.
Gregory persuaded Tiridates to destroy the last relics of the old paganism, and carried out in the religious sphere his sovereign's policy of detaching Great Armenia from the Sassanid realm and allying it with the GraecoRoman empire and civilization.
Augustus lent nc support to Tiridates in his second march on Ctesiphon (26 B.C.), but Phraates was all the more inclined on that account tc stand on good terms with him.
Providence, incensed at such cruelty, turns Tiridates into a wild boar, and afflicts his subjects with madness; but his sister, Chosrowidukht, has a revelation to bring Gregory back out of his pit.
According to Agathangelus, Tiridates went to Rome with Gregory, Aristaces, son of Gregory, and Albianos, head of the other priestly family, to make a pact with Constantine, newly converted to the faith, and receive a pallium from Silvester.
Tiberius sent Phraates's grandson, Tiridates III., and ordered L.
Here Arsaces and his brother Tiridates are derived from the royal house of the Achaemenids, probably from Artaxerxes II.; the young Tiridates is insulted by the prefect Agathocles or Pherecles; in revenge the brothers with five companions (corresponding to the seven Persians of Darius) slay him, and Arsaces becomes king.
And Tiridates from the Achaemenian king Artaxerxes II., but this has evidently no historical value.
In 63, with a strong army, he crossed the Euphrates, but Tiridates declined to give battle and concluded peace.
Vologaeses, however, thought it better to come to terms. It was agreed that both the Roman and Parthian troops should evacuate Armenia, that Tigranes should be dethroned, and the position of Tiridates recognized.