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Surname Sénat (Senat , Senatus , Sénat ) , in the entire world, is quite a common cognomen. The last name Sénat is habitual in Haiti, where it is quite a common surname, North Macedonia, and the Dominican Republic, where it is quite a rare surname. Measured by absolute frequency, it most frequently occurs in Haiti, the United States, and France. Very seldom, Sénat is the forename as well as the last name.