Was klara Polzl Jewish

Answer 1

No, Klara was not Jewish.

The only question concerning Hitler's possible Jewishness revolves around his father Alois, who was the illegitimate son of a woman called Maria Anna Schicklgruber. She had once worked as a maid for a Jew called Leopold Frankenberger and it has been suggested that he was the father of Hitler's father Alois. However, most historians disagree with this and say that Johann Heidler, a miller, was Alois' father. This Johann Heidler eventually married Maria and was legally declared the father of Alois.

It was Alois, Hitler's father, who later changed his name from Schicklgruber to Heidler (although this was written as Hitler due to spelling being not unified at that time).