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Surname Castano (Castaño , Castano ) , all around the world, is a widespread cognomen. The family name Castano is habitual in Latin America and the Caribbean, particularly Colombia, where it is a common surname, Argentina, where it is quite a common surname, and Aruba (explore the name in all countries). In absolute terms, this name is the most popular in Colombia, Argentina, and Spain. Very seldom, Castano is the forename as well as the last name.