Surname Кастелло (Castello 
, Castelloe , Кастелло 
) , throughout the world, is a common family name. The cognomen Кастелло is habitual in Saint Vincent and the Grenadines, where it is quite a common surname, Italy, and Spain, where it is quite a rare surname. In absolute terms, the name is most common in Italy, Spain, and the United States. Very seldom, Кастелло is the forename as well as the last name.