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Cognomen Passy (Passy , Паси , Пасі ) , around the world, is a common last name. The surname Passy is characteristic of Sub-Saharan Africa, particularly the Democratic Republic of the Congo, where it is quite a common surname, Cameroon, where it is quite a rare surname, and the Republic of the Congo. In absolute terms, it is the most numerous in the Democratic Republic of the Congo, Cameroon, and France. Much less frequently, Passy is the forename as well as the last name.