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Family name Dupuis (Dupuis , デュプイ, Дюпюи ) , worldwide, is a common cognomen. The cognomen Dupuis is habitual in Dominica, where it is quite a common surname, Reunion, and France (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in France, Canada, and the United States. Very seldom, Dupuis is the forename as well as the last name.