Kavan, Pilat , and Kroc surname research

Is anyone on the board researching one of these surnames? I have an Anton Pilat b 1884 Hungry Slovak married Marie (?) had a child named Wilka and immigrated all in 1906 to Detroit Michigan. They had 2 other children born in Detroit, Rudolph b 7-7-1907 and Anton Jr. b 7-9-1909.

Martin Kavan b Nov 1869 Aust. Bohemia had brothers Albert, Frank, and William. Married Mary Kroc b Nov 1873 Plzen also immigrated to Detroit. Martin and Mary had three daughters, Mary b Aug 4, 1895, Libbie Rose b Aug 5, 1900 and Helen Jean b Jun 30, 1908.
Any connection to this family??