This is the 396th most frequent German word.
olaf
"Olaf" is a male given name of Old Norse origin, meaning "ancestor's relic" or "descendant."
This sentence uses 'Olaf' as a proper noun, representing the name of an individual.
Olaf ist ein talentierter Musiker.
Olaf is a talented musician.
In this sentence, the word 'Olaf' once again functions as a proper noun identifying the person being mentioned.
Ich habe Olaf zu seiner Geburtstagsparty eingeladen.
I invited Olaf to his birthday party.
Here, 'Olaf' is used to name a character, followed by a descriptor ('the Viking') which gives additional context about who 'Olaf' is in this narrative.