Cognomen Filei (Filei 
, Филей 
) , all around the world, is a very rare family name. The last name Filei is characteristic of Hungary, where it is a rare surname, Belarus, where it is a very rare surname, and Argentina. Not in comparison with a country's population, it most frequently occurs in Argentina, Italy, and Russia. Very seldom, Filei is the forename as well as the last name.