Anna Miełżyńska was the great-grandmother of which Queen consort of the Polish-Lithuanian Commonwealth?
Anna Miełżyńska Anna Miełżyńska (about 1600-after 1640) of the Nowina clan was a Polish noble lady, the wife of Remigian Zaleski, Castellan of Łęczyca and the mother of Teresa Zaleska, who was the grandmother of Catherine Opalińska, the Queen consort of King Stanislaus Leszczynski of Poland. Her father was Łukasz Miełżyński (about 1560-1628), who was the Castellan of Gniezno (he is referred in some sources as Count). Her mother was Elżbieta Czacka (about 1575-after 1612).
Hedwig Jagiellon (1408–1431) Hedwig Jagiellon (Lithuanian: "Jadvyga Jogailaitė" , Polish: "Jadwiga Jagiellonka" ; 8 April 1408, Kraków – 8 December 1431, Kraków) was a Polish and Lithuanian princess, and a member of the Jagiellon dynasty. For most of her life she, as the only child of Wladyslaw Jagiello, was considered to be heiress of the Polish and Lithuanian thrones. After the birth of Jagiello's sons in 1424 and 1427, Hedwig had some support for her claims to the throne. She died in 1431 amidst rumors that she was poisoned by her stepmother Sophia of Halshany.