Surname קסטלו (Castello 
, קסטלו 
) , throughout the world, is a common last name. The family name קסטלו is characteristic of 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 Argentina. Much less frequently, קסטלו is the forename as well as the last name.