The nomen (plural nomina) was the Roman gens (that is clan) name. In the typical Roman name it was preceded by the praenomen and followed by the cognomen.

Some examples of nomina are listed in the following table.

Nomen	Example
Aelius	emperor Publius Aelius Traianus Hadrianus (Hadrian)
Aemilius	general Lucius Aemilius Paullus Macedonicus
Antonius	general Marcus Antonius (Mark Antony)
Claudius	emperor Tiberius Claudius Drusus Nero Germanicus (Claudius)
Cornelius	general Publius Cornelius Scipio Africanus Major
Galerius	emperor Gaius Galerius Valerius Maximianus (Galerius)
Fabius	dictator Quintus Fabius Maximus Verrucosus
Flavius	emperor Titus Flavius Vespasianus (Vespasian)
Julius	dictator Gaius Julius Caesar
Livius	tribune Marcus Livius Drusus
Ulpius	emperor Marcus Ulpius Nerva Traianus (Trajan)
Valerius	poet Gaius Valerius Flaccus
Vergilius	poet Publius Vergilius Maro (Vergil)