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Family name Tardy (Tardy , Tardif , 塔迪) , globally, is a common cognomen. The cognomen Tardy is habitual in Guernsey, where it is quite a common surname, Martinique, and France (explore the name in all countries). Measured by absolute frequency, it is commonest in France, Canada, and the United States. Very seldom, Tardy is the forename as well as the last name.