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
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