These three towns were part of the Grand Duchy Mecklenburg-Schwerin.
I don't know if they were part of the "Dominat" i.e. direct subject of the grand duke, or of the "Ritterschaft", the noblemen. For Details of this problem visit http://www.genealogienetz.de/reg/MEC/mec.html it's in English
Helmuth Gienke
www.helmuth.gienke.net