Cornelius Nepos - Liber De Excellentibus Ducibus Gentium - Lives of Eminent Commanders

De viris illustribus meaning "On Illustrious / Famous Men" are various works of exemplary literature with the same title:

De Viris Illustribus (Jerome) - A collection of 135 short biographies On Illustrious Men

De Viris Illustribus (Petrarch) - A collection of 36 short biographies On Famous Men

Cornelius Nepos De Viris Illustribus from which Aulus Gellius draws an anecdote of Cato

Boccacio - De Casibus Virorum Illustrium - A collection of 56 biographies On the Fates of Famous Men

Boccacio - De mulieribus claris - A collection of 106 biographies On Famous Women