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Family name Barrett (Barrett , باريت , בארט , among others...) , all around the world, is a widespread surname. The family name Barrett is habitual in Jamaica, where it is a common surname, Ireland, and Isle of Man, where it is quite a common surname (explore the name in all countries). Measured by absolute frequency, it most frequently occurs in the United States, the United Kingdom, and Australia. Much less frequently, Barrett is the forename as well as the last name.