Cognomen Pilyo (Pillo 
, Pilyo 
) , in all the world, is quite a rare surname. The cognomen Pilyo is characteristic of Papua New Guinea, where it is quite a rare surname, Philippines, and United Arab Emirates, where it is a rare surname. Not in comparison with a country's population, it most frequently occurs in Philippines, Italy, and Papua New Guinea. Much less frequently, Pilyo is the forename as well as the last name.