Ihle and Walter - looking for info

I am looking for info on my mom's side of the family.  
Mom was born Ruth Ottilie Tepper on June 1, 1921.  Her parents: Konrad Ihle, born September 5, 1897 in Germany, and Auguste Tepper, born July 6, 1898 in Germany, never married each other.  
Konrad's parents: Konrad Ihle, born December 4, 1873 in Germany, married on September 8, 1895 to Philippine Walter, born December 23, 1874 in Germany.  I don't know Philippine's parents.
My great-grandfather Konrad's parents: Johannes Ihle, born October 7, 1827 in Edigheim Bayern Germany, married twice, once to a Margarete Fischer, and then to my great-great-grandmother Eva Willer on April 7, 1867, Eva was born on May 3, 1836.  I can go two more steps for the Ihle line, and one more for the Willer line.