My great great grandfather was Charles August Ludetke born on Jan 14 1840.He died Oct 14,1928. He married Christina Elsabe Kroeger Feb 24 1875in Mankato Mn. They had Rose, Al, Carl, Paul, Art, Gustave Bertha , Alma Emma, Clara and Ann. My grandmother was Bertha Wilhemena who married Robert Thomas Northrup.
Please send any more information you have ! Your's is the first information I have found about my grandmother's parents.