People John William, Duke of Saxe-Weimar German Duke (1530-1573)11 March 1530 – 2 March 1573 John Frederick I30 June 1503 – 3 March 1554Sibylle of Cleves17 January 1512 – 21 February 1554 John William, Duke of Saxe-Weimar11 March 1530 – 2 March 1573 ParentsJohn Frederick I30 June 1503 – 3 March 1554Sibylle of Cleves17 January 1512 – 21 February 1554SiblingsJohn Frederick II of Saxony8 January 1529 – 9 May 1595John Frederick III, Duke of Saxony16 January 1538 – 31 October 1565 From Wikipedia and Wikidata (public domain), updated daily.
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