"Margaret of Hungary (January 27, 1242 – January 18, 1270) was a Dominican nun and the daughter of King Béla IV of Hungary and Maria Laskarina. ...
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She was the younger sister of Kinga of Poland (Kunegunda) and Yolanda of Poland and, through her father, the niece of the famed Elizabeth of Hungary." - (en.wikipedia.org 11.08.2021)
