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An agnomen (Latin:
propria hominum nomina in quattuor species dividuntur, praenomen nomen cognomen agnomen: praenomen, ut puta Publius, nomen Cornelius, cognomen Scipio, agnomen Africanus.
(Men's personal names are of four types, praenomen, nomen, cognomen and agnomen: praenomen for instance Publius, nomen Cornelius, cognomen Scipio and agnomen Africanus.)
Iam agnomen extrinsecus venit, et venit tribus modis, aut ex animo aut ex corpore aut ex fortuna: ex animo, sicut Superbus et Pius, ex corpore, sicut Crassus et Pulcher, ex fortuna, sicut Africanus et Creticus.
(Now the agnomen comes from outside, and in three styles, from personality or physique or achievements: From personality, such as Superbus ["Haughty"] and Pius [displaying the Roman syndrome of virtues including honesty, reverence to the gods, devotion to family and state, etc.], from physique, such as Crassus ["Fatty"] and Pulcher ["Handsome"], or from achievements, such as Africanus and Creticus [from their victories in Africa and on Crete].