Last name Faio (Faio 
, Phaius ) , in the world, is a very rare cognomen. The family name Faio is characteristic of Brazil, where it is a very rare surname, Italy, where it is an extremely rare surname, and the United Kingdom. Not in comparison with a country's population, the name is most common in Brazil, Italy, and the United States. Likewise, Faio is the forename as well as the last name.