John Sigismund, Elector of Brandenburg

John Sigismund was a Prince-elector of the Margraviate of Brandenburg from the House of Hohenzollern. He became the Duke of Prussia through his marriage to Duchess Anna, the eldest daughter of Duke Albert Frederick of Prussia who died without sons. Their marriage resulted in the potential creation of Brandenburg-Prussia, which became a reality after Poland's leader appointed John Sigismund in charge of Prussia in regency and, shortly thereafter, Albert Frederick died without an able, direct male heir.

8 November 1572

Born on the same birth day (8 November): Aaron Swartz • Andrea Benatti • Bram Stoker • Chris Connor • Christie Hefner • Dmitry Yazov • Driss Basri • Guus Hiddink • Katharina Molitor • Katherine Uchida • Marie Prevost • Michael Nyqvist • Pearl Thompson • Princess Augusta Sophia of the United Kingdom • Satch Sanders • Sinan Güler • Teofilo Folengo • Yann Kermorgant

Born in the same month (November 1572): Cyril Lucaris