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Cognomen Haseltine (Haseltine ) , all over the world, is a rare last name. The last name Haseltine is characteristic of the United States, where it is a rare surname, New Zealand, and the United Kingdom, where it is a very rare surname. Not in comparison with a country's population, it most frequently occurs in the United States, the United Kingdom, and Australia. Much less frequently, Haseltine is the forename as well as the last name.