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Cognomen Vernon (Vernon , Вернон , ורנון ) , globally, is a common family name. The cognomen Vernon is characteristic of Belize, where it is a common surname, Jamaica, where it is quite a common surname, and Isle of Man (explore the name in all countries). In absolute terms, it most frequently occurs in the United States, the United Kingdom, and Australia. More frequently, Vernon is the forename as well as the last name.