The son of Ariamnes I., was distinguished for his love of his brother Holophernes, whom he sent to assist Ochus in the recovery of Egypt, B. C. 350.
After the death of Alexander
, Perdiccas appointed Eumenes governor of Cappadocia; but upon Ariarathes refusing to submit to Eumenes, Perdiccas made war upon him. Ariarathes was defeated, taken prisoner, and crucified, together with many of his relations, B. C. 322. Eumenes then obtained possession of Cappadocia. Ariarathes was 82 years of age at the time of his death : he had adopted as his son, Ariarathes, the eldest son of his brother Holophernes. (Diod. xxxi. Ed.
3, where it is stated that he fell in battle; Diod. 18.16
; Arrian, apud Phot. Cod.
92, p. 69b. 26. ed. Bekker; Appian, App. Mith. 8
; Lucian, Macrob.
13; Plut. Eum. 3
; Justin, 13.6
, whose account is quite erroneous.)