The Moskops or Moskopps are from the Rhineland

Map shows the district with in Germany

The Moskops or Moskopps are from the Rhineland region of Germany
Mostly from the City Koblenz and surrounding towns and villages.
Rhineland-Palatinate (German: Rheinland-Pfalz) is one of the 16 federal states of Germany. It has an area of 19,846 square kilometres (7,663 sq mi) and about four million inhabitants. The capital is Mainz.
The federal state of Rhineland-Palatinate was established on 30 August 1946.(2nd Map shows the district with in Germany) It was formed from the northern part of the French Occupation Zone, which included parts of Bavaria (the Rhenish Palatinate), the southern parts of the Prussian Rhine Province (including the District of Birkenfeld which formerly belonged to Oldenburg), parts of the Prussian Province of Nassau (see Hesse-Nassau), and parts of Hesse-Darmstadt (Rhinehessen on the western banks of the Rhine); the new state was legally confirmed by referendum on 18 May 1947.