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Family name Duffin (达芬 , Duffin
) , in the entire world, is quite a common cognomen. The cognomen Duffin is habitual in Ireland, where it is quite a rare surname, the United Kingdom, and Bosnia and Herzegovina. In absolute terms, this name is the most popular in the United Kingdom, the United States, and Australia. Very seldom, Duffin is the forename as well as the last name.