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Last name Cavalier (Cavaliere , Cavalier , Cavaler ) , around the world, is a common cognomen. The cognomen Cavalier is habitual in Italy, where it is quite a common surname, France, where it is quite a rare surname, and Switzerland. Measured by absolute frequency, it is the most numerous in Italy, the United States, and France. Very seldom, Cavalier is the forename as well as the last name.