Herennia Cupressenia Etruscilla was Roman empress as the wife of Emperor Decius.

After the death of both Decius and Herennius Etruscus in the Battle of Abritus, Trebonianus Gallus, the governor of Moesia, was elected as emperor in June 251 AD.

[6] In order to gain popular support, Trebonianus Gallus retained Herennia Etruscilla as Augusta (empress-mother) and elevated Hostilian to Augustus, making him co-emperor alongside Trebonianus Gallus himself.

[7][8][9] Hostilian died in July 251, either from a plague or murder,[7][8] after which Trebonianus Gallus' son Volusianus, was raised to Augustus.

[12] The Cupressenia element is expanded from the 'ΚΟΥΠ' in the Alexandria coin legends, from the Latin cupresseus "cypress tree" and symbol of Juno.