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.
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.