Cognomen Vieto (Vieto 
) , in all the world, is a rare last name. The surname Vieto is habitual in Latin America and the Caribbean, particularly Costa Rica, where it is quite a rare surname, Panama, and Uruguay, where it is a rare surname. Not in comparison with a country's population, it is commonest in Costa Rica, Panama, and the United States. Much less frequently, Vieto is the forename as well as the last name.