Last name Martilyo (Martillo 
, Marculus 
, Martiello 
) , across the world, is quite a rare cognomen. The family name Martilyo is characteristic of Ecuador, where it is quite a rare surname, Italy, where it is a rare surname, and Uruguay. In absolute terms, it is the most numerous in Italy, Philippines, and Ecuador. Very seldom, Martilyo is the forename as well as the last name.