Thera are probably no Baron (=duke) Caslav. Čáslav is old royal town in border of central and east Bohemia http://www.meucaslav.cz/...
Name Pavlík or Pavlik is pretty common in Czech republic. Links bottom shows me almost 900 names of Pavlík and almost 550 of Pavlíková in Czech...
Separate names with a comma.