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Family name Bjerknes (Bjerknes ) , in the entire world, is quite a rare cognomen. The surname Bjerknes is characteristic of Northern Europe, particularly Norway, where it is quite a common surname, Sweden, where it is a rare surname, and Denmark, where it is a very rare surname. Measured by absolute frequency, the name is most common in Norway, Sweden, and the United States. Much less frequently, Bjerknes is the forename as well as the last name.