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Last name Voltaire (Voltaire , Вольтер ) , worldwide, is quite a rare cognomen. The cognomen Voltaire is habitual in Latin America and the Caribbean, particularly Haiti, where it is quite a common surname, the Dominican Republic, where it is quite a rare surname, and Jamaica. In absolute terms, it is the most numerous in Haiti, the United States, and Cameroon. Likewise, Voltaire is the forename as well as the last name.