Priscus Valerianus was a Roman

Roman Empire

The Roman Empire was the post-Republican period of the ancient Roman civilization, characterised by an autocratic form of government and large territorial holdings in Europe and around the Mediterranean....

 praetorian 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 patrician rank, connected to both the emperor Avitus

Avitus

Eparchius Avitus was Western Roman Emperor from July 8 or July 9, 455 to October 17, 456. A Gallic-Roman aristocrat, he was a senator and a high-ranking officer both in the civil and military administration, as well as Bishop of Piacenza.A representative of the Gallic-Roman aristocracy, he...

 and Bishop Eucherius of Lyons.

Valerianus served as praetorian prefect of Gaul sometime prior to 456

456

Year 456 was a leap year starting on Sunday of the Julian calendar. At the time, it was known as the Year of the Consulship of Avitus without colleague...

, when Sidonius Apollinaris

Sidonius Apollinaris

Gaius Sollius Apollinaris Sidonius or Saint Sidonius Apollinaris was a poet, diplomat, and bishop. Sidonius is "the single most important surviving author from fifth-century Gaul" according to Eric Goldberg...

 sent him a selection of his verses, praising him as a critic. Eucherius of Lyons dedicated his Epistula Paranetica ad Valerianum cognatum de contemptu mundi et saecularis philosophiae to Valerianus. His daughter was married to the orator Pragmatius.

Source

• "Valerianus 8" in Prosopography of the Later Roman Empire
  Prosopography of the Later Roman Empire
  Prosopography of the Later Roman Empire is a set of three volumes collectively describing every person attested or claimed to have lived in the Roman world from AD 260, the date of the beginning of Gallienus' sole rule, to 641, the date of the death of Heraclius, which is commonly held to mark the...
  
  , Vol II (AD 395 - 527), A.H.M. Jones & J.R. Martindale (1971–1980).