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Cognomen Cussen (Cussen
, 库森
) , across the world, is quite a rare last name. The cognomen Cussen is habitual in Ireland, where it is quite a rare surname, Australia, where it is a rare surname, and New Zealand. Not in comparison with a country's population, this name is the most popular in Ireland, the United States, and Australia. Much less frequently, Cussen is the forename as well as the last name.