John William, Duke of Saxe-Weimar German Duke (1530-1573) (1530–1573) Parents Sibylle of Cleves John Frederick I Children Maria, Abbess of Quedlinburg Sybil Marie von Sachsen-Weimar John, Duke of Saxe-Weimar Friedrich Wilhelm I, Duke of Saxe-Weimar Siblings John Frederick II of Saxony John Frederick III, Duke of Saxony Johann Ernst II von Sachsen Partners Dorothea Susanne of Simmern
