Surname Грильо (Grillo 
, Грильо 
) , in the world, is a common last name. The surname Грильо is characteristic of Italy, where it is quite a common surname, Curacao, and Argentina. Not in comparison with a country's population, it is commonest in Italy, Brazil, and the United States. Much less frequently, Грильо is the forename as well as the last name.