The agnomen (plural agnomina) formed an additional part of some Roman names, usually following the cognomen. Usually they were nicknames acquired at some point during the lifetime, but, rarely, some agnomen were inherited.

Some examples of agnomina are given in the following table.

Agnomina	Example
Africanus	general Publius Cornelius Scipio Africanus
Hadrianus	emperor Publius Aelius Traianus Hadrianus (Hadrian)
Traianus	emperor Marcus Ulpius Nerva Traianus (Trajan)