Anna of Cilli and her daughter Hedwig Jagiellon were 15th-century figures in which European country's royal family?
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.
Anna of Oldenburg Anna of Oldenburg (14 November 1501 in Oldenburg – 24 September 1575 in Emden) was a Countess consort of East Frisia as the spouse of Count Enno II of East Frisia. She was the Regent of East Frisia in 1540/42–1561 as the guardian for her minor sons. Her reign lasted until 1561 and was generally supported by the Estates. Her chief advisor was her brother, count Christopher of Oldenburg. When she died in 1575, it was exactly 35 years after her own husband's death.