Ochus

After the battle of Issus in November 333, the Persian royal family was captured by the Macedonians of Alexander the Great. The names of its members are recorded: king Darius' wife Statira, his mother Sisygambis, and his daughters Barsine/Statira and Drypetis. The name of the six-year old crown prince appears to have been Ochus; it is mentioned in the Fragmentum Sabbaiticum and by Curtius Rufus.^note[Curtius Rufus, History of Alexander 4.11.6.]

Although we don't know his fate for certain, he was of an age to have survived the childhood illnesses. The appearances are against the Macedonian conqueror: the boy must have been killed - he was too dangerous to Alexander's claim to the Persian throne.