Cognomen Antio (Antio 
) , in the world, is a rare last name. The family name Antio is characteristic of Chile, where it is quite a rare surname, Spain, where it is a rare surname, and Argentina, where it is a very rare surname. Not in comparison with a country's population, the name is most common in Chile, the United States, and Spain. Very seldom, Antio is the forename as well as the last name.