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Family name Castan (Castan
, Кастан
, Castán
) , around the world, is quite a common last name. The cognomen Castan is habitual in Martinique, where it is a common surname, France, where it is quite a rare surname, and Spain. In absolute terms, the name is most common in Mexico, France, and Spain. Much less frequently, Castan is the forename as well as the last name.