Romulus - Caesar of Imperium Romanum from 308 AD to 309 AD
Valerius Romulus, also Marcus Aurelius Romulus, was the son of the Caesar and later usurper Maxentius and of Valeria Maximilla, daughter of Emperor Galerius.

He was consul with his father in 308 and 309; the fact that Maxentius was the only consul for year 310 suggests that Valerius died in 309.

He was buried in a tomb along the Via Appia. After his death, his status was raised to Divus and his father dedicated the Temple of Divus Romulus to him along the Via Sacra near the Roman Forum.
Caesar Romulus of the Roman Empire

(1) Romulus 309-312 AD
Obverse: DIVO ROMVLO N V BIS CONS, Bare head of Romulus facing right
Reverse: AETERNAE MEMORIAE, Domed shrine with one door open, eagle standing facing right on roof; MOSTP in exergue
Ref: RIC VI Ostia 59