Cognomen Куроива (Kuroiwa 
, Куроива) , in the entire world, is quite a rare family name. The surname Куроива is habitual in Paraguay, where it is quite a rare surname, Peru, where it is a rare surname, and Singapore. In absolute terms, the name is most common in Brazil, Paraguay, and Japan. Very seldom, Куроива is the forename as well as the last name.