Sibylle of Cleves1512 - 1554 Born Wed, 17 January 1512 Düsseldorf Died Sun, 21 February 1554 Weimar Buried St. Peter und Paul, Weimar Details Parents Electress of Saxony Sibylle of Cleves Lived 42 years, 1 month, 4 days father John III 1490 - 1539 mother Maria of Jülich-Berg 1491 - 1543 Siblings Sister Anne of Cleves 1515 - 1557 Brother William 1516 - 1592