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Family name Calais (Calais , 卡莱 , Кале ) , worldwide, is quite a rare last name. The cognomen Calais is habitual in France, where it is quite a rare surname, Sweden, where it is a rare surname, and Portugal. Measured by absolute frequency, it most frequently occurs in France, Brazil, and the United States. Much less frequently, Calais is the forename as well as the last name.