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Surname Фритьоф (Frithjof , Fridtjof , Nansen ) , all over the world, is a rare last name. The cognomen Фритьоф is characteristic of Norway, where it is quite a rare surname, Denmark, and New Zealand, where it is a rare surname. In absolute terms, it most frequently occurs in Japan, the United States, and Australia. More frequently, Фритьоф is the forename as well as the last name.