Cognomen Фабиу (Fabiu 
, Фабиу) , in the entire world, is a very rare surname. The cognomen Фабиу is characteristic of Argentina, where it is a very rare surname, France, where it is an extremely rare surname, and Nigeria. Not in comparison with a country's population, this name is the most popular in Argentina, Nigeria, and Brazil. Very seldom, Фабиу is the forename as well as the last name.