I found a ton of people with the surname Kauders. Most seem to be of Jewish descent from Hungary or the Czech Republic. So far I didn't manage to locate anyone of interest in Switzerland.

Here are a few links:

geni.com/people/Erwin-Kauders/6000000004590257158

geni.com/people/Sylvia-Kauders/6000000040237739666

geni.com/people/Franz-Kauders/6000000041301221556

geni.com/people/Ivan-Klíma/6000000048757767973

jewishvirtuallibrary.org/samuel-kauders

loebtree.com/kaud.html

geni.com/discussions/183790

geni.com/surnames/documents/kauders