This is the 486th most frequent Danish word.
eriksen
"Eriksen" is a Danish patronymic surname meaning "son of Erik."
In the third sentence, 'Eriksen' is again a proper noun, indicating the name of an author who wrote a novel.
Denne roman blev skrevet af forfatteren Eriksen.
This novel was written by the author Eriksen.
In this sentence, 'Eriksen' is used as a proper noun, referring to a person’s name, specifically, the name of a football player.
Eriksen spiller fodbold for et professionelt hold.
Eriksen plays football for a professional team.
Here, 'Eriksen' is identified as a surname, which is discussed in the context of its popularity within a cultural setting.