Cognomen נילסן (Nielsen 
, Nilsen , נילסן 
) , all over the world, is a widespread surname. The surname נילסן 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). Not in comparison with a country's population, the name is most common in Denmark, the United States, and Norway. Very seldom, נילסן is the forename as well as the last name.