King of Babylonia (226-223). Receiving both the cognomen Keraunos (“thunderbolt”) and the epithet Soter (“savior”), he campaigned in Anatolia against Pergamon and was eventually assassinated. He is mentioned in the Seleucid Accessions Chronicle, and one fragmentary cuneiform tablet contains part of a chronicle spanning the period of his reign and reporting on royal expenditure in money and animals for offerings at the Esagila of Babylon (BM 35421 – Chronicle of Seleucus III).