Jews used Hebrew or Yiddish given names. The secular names used in documents were sometimes connected (a translation), the first letter of the secular name had the same sound or were not connected. I have similar issues of the sane person with several secular names in different documents. In your case I guess the Jewish name was Wolf (or Ze'ev in Hebrew). Farkas is a wolf in Hungarian and Wilhelm has W like Wolf. The name Jozsef is either not connected or he had 2 names.
