Darius II
Darius II (Old Persian: "Dārayavahuš"), also called Darius II Nothus or Darius II Ochus, was king of kings of the Persian Empire from 423 BC to 404 or 405 BC.
Artaxerxes I, who died in 424 BC, was followed by his son Xerxes II.
After a month and a half Xerxes II was murdered by his brother Secydianus or Sogdianus
(the form of the name is uncertain).
His illegitimate brother, Ochus, satrap of Hyrcania, rebelled against Sogdianus, and after a short fight killed him, and suppressed by treachery the attempt of his own brother Arsites to imitate his example.
Ochus adopted the name Darius (Greek sources often call him Darius "NothosBastard").
Neither the names Xerxes II nor Sogdianus occur in the dates of the numerous Babylonian tablets from Nippur; here effectively the reign of Darius II follows immediately after that of Artaxerxes I.
Historians know little about Darius II's reign.
A rebellion by the Medes in 409 BC is mentioned by Xenophon.
It does seem that Darius II was quite dependent on his wife Parysatis.
In excerpts from Ctesias some harem intrigues are recorded, in which he played a disreputable part.
The Elephantine papyri mention Darius II as a contemporary of the high priest Johanan of Ezra 10:6.
Ostanes (son of Darius II)
In Greek sources, Ostanes is given as the name of one of the sons of the Achaemenid Persian emperor Darius (II) Nothos, and the grandfather of Darius (III) Codomannos.
Aside from the name and relationship to the rulers, the sources do not have any information about the person.
The sources are Diodorus 17.5.5 and Plutarch "Artax".
1.1.5.
The latter explicitly names Ctesias (the physician of Artaxerxes (II) Mnemon) as his source.
Ctesias, however, names Artostes as the son of Darius II, and Ferdinand Justi suggests that the sources confused Artostes as Ostanes.
His son Arsames (II) married his cousin Sisygambis and had issue:
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Question: Who is the mother of Ostanes (Son Of Darius Ii)?