This is the 573rd most frequent German word.
markus
"Markus" is a German given name, equivalent to "Mark" or "Marcus" in English.
In this sentence, 'Markus' is used as a proper noun, specifically a person's name, identifying the subject of the sentence.
Markus spielt jeden Samstag Fußball im Park.
Markus plays football in the park every Saturday.
In this context, 'Markus' is part of a compound noun, referring to the name of a church, indicating a specific place associated with the name 'Markus', possibly Saint Markus.
Unsere Stadt hat eine neue Markus-Kirche eröffnet.
Our city has inaugurated a new Markus church.
Here, 'Markus' is used to denote the owner or originator of the discussed suggestion, showing genitive possession or relationship.