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Family name Нильсен (Nielsen , Nilsen , Нильсен ) , globally, is a widespread cognomen. The surname Нильсен is characteristic of Denmark, where it is a prevalent surname, Greenland, and Norway, where it is a widespread surname (explore the name in all countries). In absolute terms, the name is most common in Denmark, the United States, and Norway. Much less frequently, Нильсен is the forename as well as the last name.