Circular note on the Change and Determination of Family Names issued by the Reich Ministry of Interior [Germany]: “Article 7 (1) – If persons of German blood have a Jewish family name, applications to change the family name can be granted […]. (2) Applications of Jews and half-Jews to change their family name won’t be granted in general, because the name bearer might change the name in order to disguise his Jewish heritage.”
Ministerialblatt des Reichs- und Preussischen Ministeriums des Innern 1938, Column 69f., Translated by Franziska Wagener 3/8/2016