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Last name Calvert (Calvert , קלברט , Калверт ) , all around the world, is a common family name. The last name Calvert is characteristic of New Zealand, where it is quite a common surname, the United Kingdom, and Australia, where it is quite a rare surname. Measured by absolute frequency, it is commonest in the United States, the United Kingdom, and Australia. Much less frequently, Calvert is the forename as well as the last name.