Duchess Sophie of Prussia was a German princess of the Duchy of Prussia, a fief of Kingdom of Poland and a member of the House of Hohenzollern.
Sophie was the daughter of Albert Frederick, Duke of Prussia, and Marie Eleonore of Cleves. Wikipedia
Born: March 31, 1582, Königsberg
Died: November 24, 1610 (age 28 years), Kuldīga, Latvia
Great-grandparents: Ferdinand I, Holy Roman Emperor, Anne of Bohemia and Hungary, John III, Duke of Cleves, and more
Grandchildren: Ferdinand Kettler, Maria Amalia of Courland, Louise Elisabeth of Courland, and more
Children: Jacob Kettler