Hedwig Jagiellon was a member of the Jagiellonian dynasty as a daughter of Sigismund I the Old of Poland. She was Electress of Brandenburg by marriage to Joachim II Hector, Elector of Brandenburg. Wikipedia
Born: March 15, 1513, Poznań, Poland
Died: February 7, 1573 (age 59 years), Neuruppin, Germany
Parents: Sigismund I the Old and Barbara Zápolya
Spouse: Joachim II Hector (m. 1535–1571)
Great grandchildren: Christian the Younger of Brunswick, Frederick Ulrich, Duke of Brunswick-Lüneburg, Elisabeth Magdalena of Pomerania, and more