John I Albert of Poland King of Poland

John I Albert of Poland's father was Casimir IV of Poland King of Poland.  His paternal grandparents were Wladyslaw II Jagiello King of Poland and Jadwiga Queen of Poland Poland. He had four brothers and two sisters, named St. Casimir the Peacemaker, Alexander of Poland, Sigismund I the Elder, Ulászló II of Bohemia, Sophie and Barbara.  He died in 1501.