The Czech phone book is at http://phone.quick.cz
To find information on the towns: http://mesta.obce.cz
The CR has two MERIN.
You mentioned Morava region than this Merin is South of Zdar nad Sazavou or on the road between Jihlava and Velke Mezirici.
No listing for Doruska in Jihlava, Merin, Velke Mezirici or Zdar nad Sazavou. Found few in the city of Praha's,Brno's, Ostrava's phone book.