Severus Alexander, 222-235, Fatih, Roman, Severan dynasty. From Wikipedia: Marcus Aurelius Severus Alexander (October 1, 208–March 18, 235 AD), commonly called Alexander Severus, was the last Roman emperor (11 March 222–235) of the Severan dynasty. Alexander Severus succeeded his cousin, Elagabalus upon the latter's assassination in 222 AD, and was ultimately assassinated himself, marking the epoch event for the Crisis of the Third Century—nearly fifty years of disorder, Roman civil wars, economic chaos, regional rebellions, and external threats that brought the Empire to near-collapse.
Alexander Severus was the heir apparent to his cousin, the eighteen-year-old Emperor who had been murdered along with his mother by his own guards—and as a mark of contempt, had their remains cast into the Tiber river. He and his cousin were both grandsons of the influential and powerful Julia Maesa, who had arranged for Elagabalus' acclamation as Emperor by the famed Third Gallic Legion.
A rumor of Alexander's death circulated, triggering the assassination of Elagabalus.
Alexander's reign was marked by troubles. In military conflict against the rising Sassanid Empire, there are mixed accounts, though the Sassanid threat was checked. However, when campaigning against Germanic tribes of Germania, Alexander Severus apparently alienated his legions by trying diplomacy and bribery, and they assassinated him.