Taking the male form of his mother's name, Etruscus was the son of Trajan Decius. Together with his father and younger brother Hostilian, the three were briefly co-emperors before he was killed in a battle with the Goths in Moesia (present Bulgaria) along with Decius himself.
RIC 143, Cohen 14 AE Antoninianus Obv: QHERETRMESDECIVSNOBC - Radiate bust right, draped
Rev: PIETASAVGVSTORVM - Sprinkler, simpulum, jug, and littus. Lot sold for $44 2/13/02.
RIC 171a, Cohen 28 Sestertius Obv: QHERETRMESDECIUSNOBC. Draped bust and bare head of emperor.
Rev: PRINCIPIIVVENTVTIS. Herennius holding rod and spear.