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Cognomen Tobin (Tobin , Тобін , טובין , among others...) , around the world, is a common last name. The surname Tobin is characteristic of Ireland, where it is quite a common surname, Australia, where it is quite a rare surname, and New Zealand. In absolute terms, it most frequently occurs in the United States, Ireland, and the United Kingdom. Much less frequently, Tobin is the forename as well as the last name.