Marie of Prussia was a Prussian duchess by birth and Margravine of Brandenburg-Bayreuth by marriage. Wikipedia
Born: January 23, 1579, Königsberg
Died: February 11, 1649 (age 70 years), Bayreuth, Germany
Great-grandparents: Ferdinand I, Holy Roman Emperor, Anne of Bohemia and Hungary, John III, Duke of Cleves, and more
Spouse: Christian, Margrave of Brandenburg-Bayreuth (m. 1604–1649)