Family name Antoniio (Antoniio 
) , throughout the world, is a rare cognomen. The family name Antoniio is habitual in Panama, where it is quite a rare surname, Spain, where it is a rare surname, and Chile, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in Panama, Spain, and Mexico. More frequently, Antoniio is the forename as well as the last name.