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Last name Dengan (Deng , 登安 , Dengan ) , in the entire world, is a prevalent family name. The family name Dengan is characteristic of Cayman Islands, where it is a common surname, British Virgin Islands, and China (explore the name in all countries). Measured by absolute frequency, it is commonest in China, Sudan, and the United States. Much less frequently, Dengan is the forename as well as the last name.