Complex sentence: From 1906 to about 1914, he took along with his sister Kate Auerbach (1871-1940), the education of the children of his brother Max Auerbach, namely Klaus Günther and finally John Auerbach and Cornelia (later the wife of Hanning Schröder).
Split into simpler sentences: From 1906 to about 1914, he took along with his sister Käthe Auerbach (1871-1940), the education of the children of his brother Max Auerbach, namely Klaus. Günther, and finally Johannes and Cornelia (later the wife of Hanning Schröder).