Tags: Monarch.
Diadumenian (Latin: Marcvs Opellivs Antoninvs Diadvmenianvs Avgvstvs) (September 14/19 208 – 218) was the son of the Roman Emperor Macrinus and served his father briefly as Caesar (May 217–218) and as Augustus (in 218).Diadumenian was born on 14 September 208 or according to Historia Augusta on September 19 because he shared the same birthday with the Emperor Antoninus Pius. His mother was Empress Nonia Celsa although little is known of her: she is only mentioned by the Historia Augusta.