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Surname Harkin (Harkin , 哈金 , Харкин ) , around the globe, is quite a common family name. The cognomen Harkin is characteristic of Ireland, where it is quite a common surname, the United Kingdom, where it is quite a rare surname, and Australia. Not in comparison with a country's population, the name is most common in the United Kingdom, Ireland, and the United States. Much less frequently, Harkin is the forename as well as the last name.