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Cognomen Leclair (Leclair , Леклер ) , all around the world, is a common family name. The family name Leclair is characteristic of Canada, where it is quite a common surname, France, where it is quite a rare surname, and New Zealand. Not in comparison with a country's population, this name is the most popular in the United States, Canada, and France. Much less frequently, Leclair is the forename as well as the last name.