Louis, or Robert Lee Kortkamp

I am looking for any decendants of Louis or Robert Lee Kortkamp, who used to reside in the St. Louis area.It has come to my attention that my great grandfather was Louis Kortkamps brother and Roberts uncle. My ggrand was William Kortkamp, and his son was William F. I am the son of Betty Aileen Kortkamp, William F. daughter. The father and later the son ran a coal minning business near Hillsboro, ill., where my mother was born. Both Louis and his son are mentioned on the back of some of the family photos that I inherited from my mother after her death,It is our family tradition that William sr. was one of three sons that came from Prussia, therefore Louis must be one of the other brothers. My ggrand was married in Alton Ill. in 1870. I would be greatly interested to hear from other family members.Bruce