Definition of "cognomina" []

• Plural form of cognomen. (noun)

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• "These names are all cognomina, which is to say nicknames that got attached to branches of prominent families."
• "While I haven't read this directly, I would presume that the Latin name in turn formed, as many Latin cognomina do, from a descriptive adjective."
• "Only one of the cognomina (third names), Antoneinos (in Latin, Antoninus), remained."