Polish authors, books & literature.

When I taught in-company in Poland years ago, a place I did lessons at had a biggish business meeting with another related company in Germany. All the Germans had Polish surnames and all the Poles had German surnames.

And I'll betcha none of them were Jewish either, isn't that right?
Off topic here, but bear in mind as well that the famous Christian Goldberg of
Bach's Goldberg Variations was not Jewish, despite a family name which
today in the US is probably always Jewish!

And there was a tawdry character in the Third Reich called Rosenberg which would surprise many.

Surnames are t always a clue to ethnicity.

Right on, mate! Good catch:-)
Also known of several Sterns who are/weren't Jewish.

A star!

Stein and Veitch. One can be (and the other is) Scottish. Strabolgi (there was a politician called that) is also Scottish and not Italian (it comes from a place called Strathbogie).