Now , having found your topic "...Only for the brave ,Mathis" , and remembering I already tried to help you , I read again what you wrote and it appears to mee that the WOM Mathis ( your ancestor I believe ) is not the Maurice Mathis you found in the 1896 Census.
I think though that I have found the explanation for the Swizerland/Germany question.WOM said he was born in Suisse , which was transcribed Swizerland . In fact he was really born in "Suisse", in Moselle , France .Unfortunately the registers of that period have not been digitized or given to the Moselle archives. They may still be in the village called "Suisse" in Moselle .
I can try to help you further , if you make that point clear: WOM 's date and place of birth is the one you want me to look for?
Have you found where he married , can you give the date of birth , and Paris arrondissement where the first child was born?