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Surname Desilva (Desilva , ديسلفا, ديسيلفا) , globally, is a common last name. The last name Desilva is habitual in Sri Lanka, where it is quite a common surname, Bermuda, and Trinidad and Tobago, where it is quite a rare surname. In absolute terms, it is the most numerous in Sri Lanka, the United States, and United Arab Emirates. Much less frequently, Desilva is the forename as well as the last name.