Volusianus

Volusianus (Latin: Gaius Vibius Volusianus Augustus; died August 253), also known as Volusian, was a Roman Emperor from 251 to 253.
He was son to Gaius Vibius Trebonianus Gallus by his wife Afinia Gemina Baebiana. He is known to have had a sister, Vibia Galla.
The death of Decius in early June 251 led to Trebonianus Gallus' elevation to the throne. Gallus adopted Decius' son Hostilian and made him co-ruler. Volusianus was named Caesar and Princeps Juventutis. Later in 251 Hostilian died of the plague and Volusianus replaced him as Augustus and co-ruler.
Father and son were both killed in 253 by mutinous troops in Interamna.