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Last name Laroche (Laroche , Ларош , לרוש ) , all around the world, is a common surname. The family name Laroche is habitual in France, where it is quite a common surname, Canada, and Haiti, where it is quite a rare surname. Not in comparison with a country's population, it most frequently occurs in France, Canada, and the United States. Much less frequently, Laroche is the forename as well as the last name.