Cognomen Arelio (Arelio 
) , all over the world, is a rare last name. The cognomen Arelio is characteristic of Latin America and the Caribbean, particularly Mexico, where it is a rare surname, Nicaragua, where it is a very rare surname, and Honduras. In absolute terms, it most frequently occurs in Mexico, Philippines, and the United States. Very seldom, Arelio is the forename as well as the last name.