Anna of Cilli and her daughter Hedwig Jagiellon were 15th-century figures in which European country's royal family?
Anna of Cilli Anna of Cilli or Anne of Celje (  1381 – 21 May 1416) was Queen consort of Poland (1402–1416). She was the second wife of Jogaila (Władysław II Jagiełło), King of Poland and Supreme Duke of Lithuania (reigned 1387–1434). Their marriage was politically motivated to strengthen Jogaila's ties with the Piast dynasty and his claims to the Polish throne. Their marriage was rather distant and during fourteen years Anna bore only one daughter, Hedwig Jagiellon, who died without issue.
Sophia of Halshany Sophia of Halshany or Sonka Olshanskaya (Belarusian: Соф'я Гальшанская, "Sofja Halšanskaja" ; Lithuanian: "Sofija Alšėniškė" ; Polish: "Zofia Holszańska" ;  1405 – September 21, 1461 in Kraków) was a Grand Duchy of Lithuania princess of Halshany. As the fourth and last wife of Jogaila, King of Poland and Supreme Duke of Lithuania, she was Queen consort of Poland (1422–1434). As the mother of Władysław III, King of Poland and Hungary, and Casimir IV, Grand Duke of Lithuania and King of Poland, she was the founder of the Jagiellon dynasty.