KDAN

I am looking for info to find 1-My mother’s grandmother’s sur name 2- where my mother’s grandparents were born. Documentation have stated my grandfather was born in Mudas,Austria 1862.Although most documents say Bohemia,Czech orBohemia, Austria.My mother’s grandmother’s info states Yerov, Austria,1860,and Bohemia, Austria.My grandfather was born in Kolin.Bohemia,1890.Passenger records of greatgrandmother says they came from Zizan-Bohemia. Any ideas whre Yerov or Mudas might be? I cannot locate