Original sentence: His father's parents, Hermann Christian and Fanny Wittgenstein (who was a first cousin of the violinist Joseph Joachim), were both born into Jewish families but later converted to Protestantism, and after they moved from Saxony to Vienna in the 1850s, assimilated into the Viennese Protestant professional classes
Edited sentence: His father's parents, Hermann Christian and Fanny Wittgenstein (who was a first cousin of the famous violinist Joseph Joachim), were both born into Jewish families but later converted to Protestantism, and after they moved from Saxony to Vienna in the 1850s, assimilated into the Viennese Protestant professional classes