John George II
Magdalene Sibylle of Brandenburg-Bayreuth (27 October 1612 – 20 March 1687) was Electress of Saxony from 1656 to 1680 as the wife of John George II. The daughter of Christian, Margrave of Brandenburg-Bayreuth, and Marie of Prussia, she was by birth a "Markgräfin", or Margravine, and a member of the Brandenburg-Bayreuth branch of the House of Hohenzollern.