son of the emperor Decius, upon whose accession in Caesar and Princeps
Jueentuttis. In 2.51 he was consul, was admitted to a participation in the title of
Augustus, and towards the close of the year was slain along with his father in a bloody battle
fought against the Goths in Thrace. [DECIUS.] We gather from coins
that his designation at full length was Q. Herennius Etruscus Messius Trajanus
Decius, the names Herennius Etruscus being derived from his mother
Herennia Etruscilla, while the rest were inherited from his sire. (Aurel. Vict. de Caes. xxix. Epit. xxix.;