I don't have anything specific on them. Did a quick check on Ancestry and found the following:
Peter I. Federspiel
Birth Date: 17 Oct 1912
Birth Place: Cincinnati, Ohio
Death Date: 20 Feb 1945
Death Place: Chicago, Cook, Illinois
Burial Date: 23 Feb 1945
Burial Place: Norwood, Cook, Illinois
Cemetery Name: Acacia Park
Death Age: 32
Occupation: Photo-Engraver
Race: White
Marital Status: M
Gender: Male
Residence: Chicago, Cook, Illinois
Father Name: Ludwig Federspiel
Father Birth Place: Faget, Hungary
Mother Name: Theresa Kedwig
Mother Birth Place: Budapest, Hungary
Spouse Name: Viola
FHL Film Number: 1983259
Illinois, Deaths and Stillbirths Index, 1916-1947
This is probably your person. Ludwig translates to Louis in English.
I will add this person into my Federspiel 2010 tree in the near future, if I find out anything else, you can find it there. If you want to add to it, let me know.
Cathy Huber