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In page Elizabeth of Kuyavia:

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Elizabeth of Kuyavia (Polish: Elżbieta, Serbo-Croatian: Elizabeta/Елизабета; 1315/1320 – after 22 August 1345) was a Polish noblewoman of the House of Piast. She was the only daughter of Duke Kazimierz III of Gniewkowo[1] and his wife, whose name and origins are unknown; her brother, Władysław the White, was later a candidate for the Polish throne.[citation needed]