Hostilian: emperor of the Roman world (r. 251).
- c.230-235: Gaius Valens Hostilianus
- September 250: caesar; Princeps Iuventutis
- June 251: Imperator Caesar Gaius Valens Hostilianus Messius Quintus Augustus
- July 251: death of natural causes (plague)
Successor of: Decius
After the death of his father Decius and his elder brother Herennius Decius, Hostilianus was adopted by Trebonianus Gallus. He soon died of natural causes.