Hydarnes (Persian, Old (ca.600-400 B.C.);: |Vidṛna), also known as Idernes, was a Persian nobleman, who was active during the reign of Darius II . He was a descendant (perhaps grandson) of Hydarnes the Younger, who was himself the son of Hydarnes, one of the seven Persian conspirators who overthrew the Pseudo-Smerdis. He was the father of Stateira and Teritoukhmes.