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Surname Lagier (Lagier
) , globally, is quite a rare family name. The cognomen Lagier is characteristic of Reunion, where it is quite a common surname, France, where it is quite a rare surname, and Switzerland, where it is a rare surname. In absolute terms, the name is most common in France, Argentina, and the United States. Very seldom, Lagier is the forename as well as the last name.