there is a larger number of B.'s to be found in the area of Darmstadt (straight south of Frankfurt/Main). The federation state is named Hessen (not Hesse)!!! Harbshausen is in the north of the same state, whereas Darmstadt is in the south (about 200 km away) Until now, I have not found out more about these people down there.
Hattingen/Ruhr is located at the southern edge of the famous "Ruhrgebiet" between Essen and Bochum in the state "North-Rhine Westfalia". Distance to Harbshausen is ca. 200 km.