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Cognomen Ларош (Laroche , Larosh , Ларош ) , in the world, is a common last name. The family name Ларош is habitual in France, where it is quite a common surname, Canada, and Haiti, where it is quite a rare surname. Measured by absolute frequency, it is the most numerous in France, Canada, and the United States. Much less frequently, Ларош is the forename as well as the last name.