Pertinax (Publius Helvius Pertinax) pûrˈtĭnăks [key], 126–193, Roman emperor (193), b. Liguria. Formerly a general, he reluctantly succeeded Commodus on the throne. Attempting to curb license in the Praetorian Guard, he was slain by a soldier, thus ending his brief reign of three months. Didius Julianus succeeded him.

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