Demetrius I Soter

Demetrius I Soter (Ancient Greek: Δημήτριος Α` ὁ Σωτήρ, Dēmḗtrios ho Sōtḗr, "Demetrius the Saviour"; 185 – June 150 BC) reigned as king of the Hellenistic Seleucid Empire from November 162 to June 150 BC. Demetrius grew up in Rome as a hostage, but returned to Greek Syria and overthrew his young cousin Antiochus V Eupator and regent Lysias. Demetrius took control during a turbulent time of the Empire, and spent much of his time fighting off revolts and challenges to his power from threats such as Timarchus and Alexander Balas.

Source: Wikipedia — https://en.wikipedia.org/wiki/Demetrius_I_Soter