Elizabeth of Poland was Queen of Hungary by marriage to Charles I of Hungary, and regent of Poland from 1370 to 1376 during the reign of her son Louis I. Wikipedia
Born: 1305
Died: December 29, 1380 (age 75 years), Budapest, Hungary
Spouse: Charles I of Hungary (m. 1320–1342)
Children: Louis I of Hungary, Andrew, Duke of Calabria, Stephen of Anjou, and more
Grandchildren: Jadwiga of Poland, Mary, Queen of Hungary, Catherine of Hungary, and more
Siblings: Casimir III the Great
Parents: Władysław I Łokietek and Jadwiga of Kalisz