Publius Valerius Comazon Eutychianus (died 222) was a Roman

Ancient Rome

Ancient Rome was a thriving civilization that grew on the Italian Peninsula as early as the 8th century BC. Located along the Mediterranean Sea and centered on the city of Rome, it expanded to one of the largest empires in the ancient world....

 general and ally of emperor Elagabalus

Elagabalus

Elagabalus , also known as Heliogabalus, was Roman Emperor from 218 to 222. A member of the Severan Dynasty, he was Syrian on his mother's side, the son of Julia Soaemias and Sextus Varius Marcellus. Early in his youth he served as a priest of the god El-Gabal at his hometown, Emesa...

. Upon the accession of Macrinus

Macrinus

Macrinus , was Roman Emperor from 217 to 218. Macrinus was of "Moorish" descent and the first emperor to become so without membership in the senatorial class.-Background and career:...

 as emperor in 217, Eutychianus orchestrated a revolt among the Third Legion

Legio III Gallica

Legio tertia Gallica was a Roman legion levied by Julius Caesar around 49 BC, for his civil war against the conservative republicans led by Pompey. The cognomen Gallica suggests that recruits were originally from the Gallic Roman provinces. The legion was still active in Egypt in the early 4th...

 to help secure the throne for Elagabalus, who was tied to the Severan dynasty

Severan dynasty

The Severan dynasty was a Roman imperial dynasty, which ruled the Roman Empire between 193 and 235. The dynasty was founded by the Roman general Septimius Severus, who rose to power during the civil war of 193, known as the Year of the Five Emperors....

. Eutychianus was later rewarded with various important offices in the Empire, including prefect

Praetorian prefect

Praetorian prefect was the title of a high office in the Roman Empire. Originating as the commander of the Praetorian Guard, the office gradually acquired extensive legal and administrative functions, with its holders becoming the Emperor's chief aides...

 of Elagabalus' bodyguard

Bodyguard

A bodyguard is a type of security operative or government agent who protects a person—usually a famous, wealthy, or politically important figure—from assault, kidnapping, assassination, stalking, loss of confidential information, terrorist attack or other threats.Most important public figures such...

, known as the Praetorian Guard

Praetorian Guard

The Praetorian Guard was a force of bodyguards used by Roman Emperors. The title was already used during the Roman Republic for the guards of Roman generals, at least since the rise to prominence of the Scipio family around 275 BC...

, consul

Roman consul

A consul served in the highest elected political office of the Roman Republic.Each year, two consuls were elected together, to serve for a one-year term. Each consul was given veto power over his colleague and the officials would alternate each month...

 in 220 and an unprecedented three terms as City prefect

Praefectus urbi

The praefectus urbanus or praefectus urbi, in English the urban prefect, was prefect of the city of Rome, and later also of Constantinople. The office originated under the Roman kings, continued during the Republic and Empire, and held high importance in late Antiquity...

 in 220, 221 and 222.

Elagabalus proved to be a highly unpopular ruler, and after barely four years in office, he was murdered by members of the Praetorian Guard who proclaimed his cousin Alexander Severus

Alexander Severus

Severus Alexander was Roman Emperor from 222 to 235. Alexander was the last emperor of the Severan dynasty. He succeeded his cousin Elagabalus upon the latter's assassination in 222, and was ultimately assassinated himself, marking the epoch event for the Crisis of the Third Century — nearly fifty...

 emperor in his place. Eutychianus was among those who were hunted down and killed by the Praetorians in the aftermath of Elagabalus' murder.