Jadwiga of Lithuania

Hedwig Jagiellon
Born	8 April 1408 Kraków
Died	8 December 1431 (aged 23) Kraków
Burial	Wawel Cathedral, Wawel Hill, Kraków
Dynasty	Jagiellon
Father	Wladislaw Jagiello
Mother	Anna of Celje

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.

She was the only daughter of King of Poland and Supreme Duke of Lithuania Wladyslaw Jagiello by his second wife, Anna of Celje, daughter of William, Count of Celje, and Anna of Poland. Anna of Celje was a granddaughter of King Casimir III of Poland and therefore a Piast heiress. Thanks to his marriage to her in 1402, Jagiello re-legitimized his rule as King of Poland after the death of his first wife, Hedwig (Jadwiga), who reigned as King (not Queen consort) of Poland. Jagiello's and Anna's only daughter, born in 1408, was named after Queen Hedwig.

After it became apparent that Anna of Celje would not be able to bear any further children, Hedwig was officially proclaimed heiress to the throne during a congress in Jedlnia in early 1413. Queen Anna died in 1416, leaving Hedwig as Jagiello's sole surviving child. In 1417, Jagiello married Elisabeth of Pilica, and in 1422, Sophia of Halshany. Hedwig was raised by both stepmothers.

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Wikipedia