Alexander Severus (Marcus Aurelius Alexander Severus)sĭvērˈəs, d. 235, Roman emperor (222–35), b. Syria. His name was changed (221) from Alexius Bassianus when he was adopted as the successor to Heliogabalus. Although he won a triumph in a campaign (232) against Ardashir I of Persia, he could not maintain discipline among his own troops and had to retire from battle. In a mutiny on the Rhine, he and his mother, Julia Mamaea, were murdered by the supporters of Maximin (d. 238).
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