I am searching for information about my ancestors for the time before they immigrated from Ceska Trebova to Steele County, Minnesota USA in 1870 & 1871.

Great grandparents (immigrated 1870 with 4 children):
Wencl J. Haberman, born 1840
Theresa Braulick, born 1842 (near Praha)

Great-great grandparents (immigrated 1871 with 6 children):
Vaclav Haberman, born 1818
Rose Stangler, born 1820 in Ostrov

Thank you in advance for any information you can offer.
John Haberman