This is the 3105th most frequent Swedish word.
marcus
"Marcus" is a proper noun, specifically a male given name, in Swedish.
Here, 'Marcus' is used as a proper noun, representing a person's name.
Marcus är en skicklig gitarrist.
Marcus is a skilled guitarist.
In this sentence, 'Marcus' again functions as a proper noun, identifying a specific individual.
Har du träffat Marcus nyligen?
Have you met Marcus recently?
Here, 'Marcus' is used in coordination with another proper noun, 'Johan', indicating multiple individuals.