Letter Main Candidate Secondary Comments A Augustus First official emperor B Brutus Killer of Caesar C Caesar First unofficial emperor D Diocletian Ruled over the Empire at its largest extent E Eusebius First chronicler of the Christian Church F Flavius Fabius Both are names of gentes, the aristocratic families of Rome G Germanicus Father of crazy Caligula H Hadrianus Roman emperor, usually spelled Hadrian in English I Irenaeus Church theologian J Julius Name of the gens to which Caesar belonged K – L Livius Name of a gens, made famous by the historian that goes by its name M Marcus Common name (see Marcus Aurelius and Marcus Antonius) derived from Mars N Nero Emperor famous for burning down Rome O Octavius Common name, for the eight-born P Pompeius Another gens, made famous by several Romans (Pompey) Q Quintus Common name, for the fifth-born R Romulus The founder of Rome S Scipio Sextus, Septimus A gens made famous by the winner against Carthage T Titus Traianus Early Roman emperor U Ulpius Gens to which the emperor Trajan belonged V Valens Late emperor, captured by the Persians W – X – Y – Z –