This is the 8573rd most frequent German word.
koblenzer
"Koblenzer" refers to a person from Koblenz, a city in Germany.
In this sentence, 'Koblenzer' functions as an adjective describing the mayor, indicating that they are from Koblenz.
Der Koblenzer Bürgermeister hielt eine Rede.
The mayor of Koblenz gave a speech.
Here, 'Koblenzer' is used as an adjective to describe the wine, suggesting it originates from Koblenz.
Sie haben einen Koblenzer Wein mitgebracht.
They brought a Koblenz wine.
In this usage, 'Koblenzer' serves as a plural noun referring to the inhabitants of Koblenz.