Diadumenian

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Diadumenian
Emperor of the Roman Empire
Diadumenianus on a denarius.
Reign	May 217 - 218 (as Caesar under Macrinus); 218 (as Augustus
Full name	Marcus Opellius Antoninus Diadumenianus
Died	218
Place of death	Antioch
Father	Macrinus
Mother	Nonia Celsa

Marcus Opellius Antoninus Diadumenianus or Diadumenian (d. 218) was the son of Roman Emperor Macrinus, who served his father briefly as Caesar from May, 217 to 218, and as Augustus in 218. His mother was Empress Nonia Celsa, although her existence remains dubious, because she was only mentioned by the Historia Augusta. He was born Marcus Opellius Diadumenianus, but his name was changed and added Antoninus to to solidify connection to the family of Marcus Aurelius as done by Caracalla.

Diadumenian had little time to enjoy his position or to learn anything from its opportunities because the legions of Syria revolted and declared Elagabalus ruler of the Roman Empire. When Macrinus was defeated on June 8, 218, at Antioch, Diadumenian followed his father's death.