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Globally, Guster (Guster ) is a rare epicene given name. The forename Guster is characteristic of South Africa, where it is a rare principally female, but very infrequently male name, Peru, where it is a very rare boy's name, and Indonesia. Measured by absolute frequency, it most frequently occurs in South Africa, Indonesia, and the United States. More frequently, Guster is the last name as well as the forename.