Complex sentence: Christine Vulpius and Goethe had a son, Julius August Walther von Goethe (25 December 1789--28 October 1830), who became chamberlain to the Grand Duke of Saxe-Weimar.
Split into simpler sentences: Christine Vulpius and Goethe produced a son, Julius August Walther von Goethe (25 December 1789--28 October 1830). He was chamberlain to the Grand Duke of Saxe-Weimar.