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Surname Fridtjov (Fridtjov ) , in the world, is an extremely rare last name. Much more frequently, Fridtjov is the forename as well as the last name.
Fridjof, Fridtjof, Frithiof, Frithjof, Frithjov, Fritiof, Fritjof, Friðþjófur, and Фритьоф
Lea, Owre, Øwre, Urdal, Bakker, Juhler, Loderup, Bergmann, Markussen, and Stokkeland