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Last name Déan (Dean , Déan ) , in the entire world, is a widespread family name. The surname Déan is characteristic of Bahamas, where it is a common surname, British Virgin Islands, and Isle of Man (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Australia. Likewise, Déan is the forename as well as the last name.