Diadumenian, Roman emperor (died 218)

Diadumenian

Roman emperor in 218

Diadumenian was the son of the Roman emperor Macrinus and served as his co-ruler for a brief time in 218. His mother, Macrinus' wife, is called Nonia Celsa in the unreliable Historia Augusta, though this name may have been fictional. Diadumenian became caesar in May 217, shortly…