Adoptivkaiser
Justus’ cognomen was a very common Latin name in the Jewish Catacombs of Rome. Josephus gave his son a Latin name in preference to a Greek one, despite the fact that Greek was spoken more among Roman Jews than Latin. Justus was a contemporary of the ruling Flavian dynasty and Nerva–Antonine dynasty of the Roman Empire. He was alive when Josephus was compiling his historical writings and when his father died about 100. Unfortunately, little is known on his remaining life.