Cognomen Флавий (Flavio 
, Flavius 
, Флавий 
) , across the world, is a common last name. The surname Флавий is habitual in Latin America and the Caribbean, particularly Saint Lucia, where it is a common surname, Mexico, where it is quite a common surname, and Nicaragua (explore the name in all countries). Measured by absolute frequency, it is commonest in Mexico, Brazil, and Romania. More frequently, Флавий is the forename as well as the last name.