For the similarly named Macedonian ruler, see Demetrius II of Macedon. For the Macedonian prince, see Demetrius the Fair.Demetrius II (Ancient Greek: Δημήτριος Β`, Dēmḗtrios B; died 125 BC), called Nicator (Ancient Greek: Νικάτωρ, Nikátōr, "the Victor"), was one of the sons of Demetrius I Soter, brother of Antiochus VII Sidetes and his mother could have been Laodice V. He ruled the Seleucid Empire for two periods, separated by a number of years of captivity in Hyrcania in Parthia.