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In page Kunigunde of Poland:

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Kunigunde of Poland (Kunegunda) (c. 1298 – 9 April 1331) was a daughter of Władysław I the Elbow-high and his wife Jadwiga of Greater Poland.[citation needed] Her siblings included, Casimir III of Poland and Elisabeth, Queen of Hungary. She was a member of the House of Piast. [1]