From Wikipedia:
The name of the city is derived from the Old/Middle High German term Munichen, meaning "by the monks".
The name of the city is derived from the Old/Middle High German term Munichen, meaning "by the monks".
The city state of Monaco is also called Monaco in Italian. Both the English and the Italian names are derived from the Greek word Monoikos, meaning "single house".
The German city of München is called Monaco in Italian and Monacum/Monachium in Latin. The Italian name derives from the Latin name, which in turn is derives from the Latin word for monk.
To avoid confusion, the German city is more commonly referred to as "Monaco di Baviera" (Monaco of Bavaria) to better differentiate it from the microstate.