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Cognomen Faustinus (Faustino , Faustinus , Фаустин ) , in all the world, is a widespread family name. The surname Faustinus is habitual in Portugal, where it is quite a common surname, Mexico, and Spain (explore the name in all countries). Measured by absolute frequency, it is the most numerous in Mexico, Brazil, and Spain. Also, Faustinus is the forename as well as the last name.