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.