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Last name Долли (Dolly , Dolli , Dolley ) , in all the world, is a common cognomen. The cognomen Долли is habitual in Trinidad and Tobago, where it is quite a common surname, Liberia, where it is quite a rare surname, and Namibia. Measured by absolute frequency, it is commonest in India, Bangladesh, and Nigeria. More frequently, Долли is the forename as well as the last name.