praenomen Syllabification: (prae·no·men)Pronunciation: /prēˈnōmən/Definition of praenomen noun an ancient Roman’s first or personal name, for example Marcus Tullius Cicero. Compare with nomen, cognomen, agnomen.Origin:Latin, from prae 'before' + nomen 'name'praenomen in other Oxford dictionaries Definition of praenomen in the British & World English dictionary