Dear Sven,
This doesn't answer the posted question. Am wondering if St. Peters is catholic or ??? church.
But in St. Louis online resources I did find the following Honerkamps:
St. Louis Post Dispatch Newspaper has obits indexed for the dates
1880-1922, 1942-1945, 1992-2003 at: http://www.slpl.lib.mo.us/libsrc/obit.htm
I noted the following:
Honkomp, Henry 6/11 p1B - 1915 Maybe?
Brucker, Leah M. (aka Honerkamp) (nee De Roy) 9/2 pC8 - 2001
CLICK, EDITH H. (nee Honerkamp) 8/22 -1992
Scheidegger, Helen T. (see Honerkamp) (missing date) - 2001
The obit dates below match burial information through the burial search for St. Louis Catholic Cemeteries at : http://www.slpl.lib.mo.us/libsrc/obit.htm
HONERKAMP, FRED 10/2, *10/4 - 1918 ****
Honerkamp, Stella (nee Knapp) 1/25 p12, *1/27 p15- 1915 ****
Huebschen, Nicholas 6/17 p14 - 1914 ****
Information on how to obtain located at website. I think photocopies of obits are only 25 cents and 1 dollar for mail charge but unsure if Library will charge same or send outside the U.S. I am in St. Louis though and perhaps I can request and transcribe for you if you think might be in relation to your family.