Palladius was Caesar

Caesar (title)

Caesar is a title of imperial character. It derives from the cognomen of Julius Caesar, the Roman dictator...

of the Western Roman Empire

Western Roman Empire

The Western Roman Empire was the western half of the Roman Empire after its division by Diocletian in 285; the other half of the Roman Empire was the Eastern Roman Empire, commonly referred to today as the Byzantine Empire....

 for two months in 455, together with his father Petronius Maximus

Petronius Maximus

Flavius Petronius Maximus was Western Roman Emperor for two and a half months in 455. A wealthy senator and a prominent aristocrat, he was instrumental in the murders of the Western Roman magister militum, Flavius Aëtius, and the Western Roman Emperor Valentinian III...

.

Biography

According to Hydatius

Hydatius

Hydatius or Idacius , bishop of Aquae Flaviae in the Roman province of Gallaecia was the author of a chronicle of his own times that provides us with our best evidence for the history of the Iberian Peninsula in the 5th century.-Life:Hydatius was born around the year 400 in the...

, he was a son of Petronius Maximus

Petronius Maximus

Flavius Petronius Maximus was Western Roman Emperor for two and a half months in 455. A wealthy senator and a prominent aristocrat, he was instrumental in the murders of the Western Roman magister militum, Flavius Aëtius, and the Western Roman Emperor Valentinian III...

 from a previous marriage. In the second half of the 430s, he could have been a praetor.

In March 455 his father become Emperor after the death of Valentinian III

Valentinian III

-Family:Valentinian was born in the western capital of Ravenna, the only son of Galla Placidia and Flavius Constantius. The former was the younger half-sister of the western emperor Honorius, and the latter was at the time Patrician and the power behind the throne....

. Petronius appointed Palladius Caesar

Caesar (title)

Caesar is a title of imperial character. It derives from the cognomen of Julius Caesar, the Roman dictator...

and had him marry Eudocia

Princess Eudocia

Eudocia, or Eudoxia was the eldest daughter of Roman emperor Valentinian III and his wife, Licinia Eudoxia. She was thus the granddaughter on her mother's side of Eastern emperor Theodosius II and his wife, the poet Aelia Eudocia; and on her father's side of Western emperor Constantius III and his...

, the elder daughter of Valentinian. However, Eudocia had been betrothed to Huneric

Huneric

Huneric or Honeric was King of the Vandals and the oldest son of Genseric. He dropped the imperial politics of his father and concentrated mainly on internal affairs. He was married to Eudocia, daughter of western Roman Emperor Valentinian III and Licinia Eudoxia. She left him, probably in 472...

, son of the King of the Vandals

Vandals

The Vandals were an East Germanic tribe that entered the late Roman Empire during the 5th century. The Vandals under king Genseric entered Africa in 429 and by 439 established a kingdom which included the Roman Africa province, besides the islands of Sicily, Corsica, Sardinia and the Balearics....

 Genseric

Genseric

Genseric , also spelled as Geiseric or Gaiseric, was King of the Vandals and Alans and was one of the key players in the troubles of the Western Roman Empire in the 5th century...

, who retaliated sacking Rome

Sack of Rome (455)

The sack of 455 was the second of three barbarian sacks of Rome; it was executed by the Vandals, who were then at war with the usurping Western Roman Emperor Petronius Maximus....

. Petronius died stoned by an angry mob (April 455), a fate probably shared by Palladius.