I have three of Lawrence & Katherine's children's marriage certificates. Annie who married Joseph Janda, Mary who married Joseph Mleziva, Mathias who married Anastasia Bures. All three of these certificates say's that Katherine's last name was Mach. I believe Schweiner or Schweimer is Katherine's mothers maiden name. I do have more information on the Lawrence Kadlec line including the name of the ship & the year that they sailed to America. Let me know if I can be of any more help.