This is the 394th most frequent Swedish word.
olsson
"Olsson" is a Swedish surname meaning "son of Ola."
Here, 'Olsson' is used as a proper noun indicating a familial last name.
Olsson är en vanlig efternamn i Sverige.
Olsson is a common last name in Sweden.
In this sentence, 'Olsson' refers to a specific person, likely familiar to the speaker.
Jag såg Olsson på väg till affären.
I saw Olsson on the way to the store.
Here, 'Olsson' denotes a possessive form, indicating that the individual named Olsson is the creator of the song.