Adelgunde Koepke *4.3.1885

I´m looking for anchestors of Adelgunde Koepke *4.3.1885 +5.1972 married with Ferdinand Koepke, last residence 60016 Des Plaines, Cook, IL. They have had 3 children:Gertrud *7.10.1909, Marie *23.10.1910 and Arthur *1912.

Thanks for any help.

Karin Schöneberger