Gaius Vibius Volusianus Augustus was a Roman Emperor from 251 to 253. He was son to emperor Trebonianus Gallus by his wife Afinia Gemina Baebiana.
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.
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.

(1)
Trebonianus Gallus
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Volusian
251-253 AD
Obverse:
Laureate, draped and cuirassed bust of Trebonianus Gallus right from behind confronting radiate, draped and cuirassed bust of Volusian left; AΥTOK K Γ OYIB TΡEB ΓAΛΛOΣ CAI OΥOΛOΥCIA_NOC CEB·
Reverse:
Facing, seated statue of Tyche in tetrastyle temple with arched central bay; ram right, above; river-god swimming right, below; ANTIOXEΩN__ MHTΡO KOΛΩN / Δ_E / S C
(2)
Volusian
251 AD
Obverse:
radiate, draped and cuirassed bust right AYTOK K Γ AΦIN ΓAΛ OYENΔ OYOΛOYCCIANOC CEB / ·
Reverse:
eagle facing, head left, wreath in beak; ΔHMAPX EΞOYCIAC / A / S C
(3)
Volusian
251-253 AD
Obverse:
laureate, draped and cuirassed bust right from behind; AV KE Γ OVIΔ OVEΛ OVOΛOVCCANOI
Reverse:
Tyche standing half left, holding rudder and cornucopia; ICINΔ_E_ΩN / AP_X·M
(4)
Volusian
253 AD
Obverse:
IMP CAE C VIB VOLVSIANO AVG, radiate, draped and cuirassed bust right
Reverse:
CONCORDIA AVGG, Concordia standing left; holding cornucopiae and patera
(5)
Volusian
251-253 AD
Obverse:
Α Κ Γ ΟΥ ΑΦ ΓΑΛ ΟΥΟΛΟΥϹΙΑΝΟΝ, Head of Volusian facing right, wearing laurel wreath
Reverse:
ΠƐΡΓΑΙΩΝ, Three-legged chest with folding doors, with three purses upon it
(6)
Volusian
252 AD
Obverse:
radiate, draped and cuirassed bust right from behind; IMP C C VIB VOLVSIANVS AVG
Reverse:
Virtus standing right, holding spear and resting hand on shield; VIRTVS AVGG
(7)
Volusian
Obverse:
IMP CAE C VIB VOLVSIANO AVG, radiate draped bust right
Reverse:
P M TR P IIII COS II, emperor standing left, holding patera over tripod altar, and sceptre
(8)
Volusian
251-253
AE
unit
Antiochia (Pisidia)
Obverse:
IMP C VIB AF GAL VOLVSSIANO AVG, radiate, draped bust right
Reverse:
NTIOCHI COL A S R, vexilium surmounted by eagle, between two legionary eagles