Seleucus Iii Soter in Wikipedia
Seleucus III Soter, called Seleucus Ceraunus (Greek: Σέλευκος Γ' Σωτὴρ, Σέλευκος Κεραυνός ca. 243 BC - 223 BC), was a ruler of the Hellenistic Seleucid kingdom, the eldest son of Seleucus II Callinicus and Laodice II. His birth name was Alexander and changed his name to Seleucus after he succeeded his father as King. After a brief reign of three years (225 BC-223 BC), Seleucus was assassinated in Asia Minor by members of his army while on campaign against Attalus I of Pergamon. His official byname "Soter" - Greek: Σωτὴρ means "Saviour", while his nickname "Ceraunus" - Greek: Κεραυνός means "Thunder".