Marcus Antoninus may refer to: Marcus Aurelius Antoninus (Marcus Aurelius) (121–180), Roman emperor from 161 to 180 Marcus Aurelius Commodus Antoninus (Commodus) (161–192), Roman emperor from 180 to 192 Marcus Aurelius Antoninus (Caracalla) (188–217), Roman emperor from 198 to 217 Marcus Opellius Antoninus Diadumenianus (Diadumenian) (208–218), Roman emperor in 218 Marcus Aurelius Antoninus (Elagabalus) (203/4–222), Roman emperor from 218 to 222