Do the Czechs or Slovaks have any Royalty or dukes, princes, etc.. other rulers?

Well if youre asking about a Czech or Slovakian royal family, I think it didnt exist because both the places where those people lived and are living were all absorbed and invaded by clashing empires. Some portions of their lands overlapped the jurisdictions of the other's. Czech and Slovaks were once part of the Austrian Empire, then Austro-Hungarian Empire then invaded by Nazi Germany which further isolated all Czech and Slovak ethnicities in Europe. There was a single unified country of Czechoslovakia where both the Czech and Slovak people lived harmoniously. Same applies in some other nationalities in Central and Eastern Europe. Most of their nationalities wee scattered in Europe after World War II. Even this modern day, there are still "ethnic cleansing program" still existing as result of those scattered nationalities. One can find a Polish near its borders with Germany, Czech Republic, Slovakia and Russia....Germans in Austria, Poland, Czech Republic, Slovakia....Italians in Austria, Croatia, Slovenia...Hungarians in Czech Republic, Austria, Slovakia, Romania, Bulgaria....Serbs in Albania, Croatia, Slovenia, Albania....and so on.