Antiochus II Theos
Antiochus II Theos (286–246 BC), was an emperor of the Hellenistic Seleucid Empire who reigned 261–246 BC). He succeeded his father Antiochus I Soter in 261 BC. He was the son of Antiochus I and princess Stratonice, the daughter of Demetrius Poliorcetes.
He inherited a state of war with Egypt, which was fought along the coasts of Asia Minor (the "Second Syrian War"). Antiochus also made some attempt to get a footing in Thrace. During the war he was given the title "Theos" which means "God" in Greek, being such to the Milesians in slaying the tyrant Timarchus.
In Bactria, his satrap Diodotus revolted in 255 BC, and founded the Greco-Bactrian kingdom, which further expanded in India in 180 BC to form the Greco-Indian kingdom (180–1 BC). Then about 250 BC, Arsaces led a revolt of the Parthians, which deprived him of those territories.
About this time, Antiochus made peace with Ptolemy II, ending the Second Syrian War. Antiochus repudiated his wife Laodice and married Ptolemy's daughter Berenice to seal their treaty, but by 246 BC Antiochus had left Berenice and her infant son in Antioch to live again with Laodice in Asia Minor.
Laodice poisoned Berenice, her infant son, and in time Antiochus. She then proclaimed her own son Seleucus II Callinicus king.
Antiochus I Soter
Seleucus II Callinicus