Hedwig Jagiellon, Electress of Brandenburg (d. 1573)
Hedwig Jagiellon (Polish: Jadwiga Jagiellonka, Lithuanian: Jadvyga Jogailaitė, German: Hedwig Jagiellonica; 15 March 1513 – 7 February 1573) was a granddaughter of Emperor Sigismund and of the Jagiellonian dynasty as daughter of Sigismund I the Old of Poland. She was Electress of Brandenburg by marriage to Joachim II Hector, Elector of Brandenburg.