There is no German Jewish name (or German): Sharp. I believe there is no such German word, at least because of the combination SH. In German it is written: SCH.
but, the name Scharf (means: sharp in German and Yiddish) is well-known in Jewish People.
The name Wertz can be German, Jewish or German-Jewish.
It is of German origin, but it may be a Jewish name.
The name is in German-Jewish (or Ashkenazic) and means "Deerfield."
Wasserburger can be a German Jewish name, but like all German Jewish names, it can be used by both Jews and non-Jews.
German
The family name Kaminsky can be German, Jewish or German-Jewish in origin.
No. It is mainly a German name but it can be Jewish.
Yes, it is either of Jewish or German origin.
"Braun" is a color in German and a German name.
Yes it is. It is old an old German/Jewish name.
Brutsche is in German the nickname for a grumpy person. Althought a Jew may have this name, it is not known as a "Jewish name".
It's a German name, a lot of Jews have German names because the Jews who lived in the German Principalities were required to buy German last names from the Princes. Any Jewish name in the German language obviously is a German name adopted by the Jews. Additionally, the Jewish language of Yiddish is a dialect of Old German.