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Cognomen Clifford (Clifford , Клиффорд , קליפורד ) , in the world, is a common family name. The last name Clifford is characteristic of Ireland, where it is quite a common surname, Monaco, and Australia (explore the name in all countries). Not in comparison with a country's population, it most frequently occurs in the United States, Nigeria, and the United Kingdom. More frequently, Clifford is the forename as well as the last name.