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Kunigunde was first betrothed to Hartmann of Germany in 1277, a son of Rudolf I of Germany and his first wife Gertrude of Hohenberg. The marriage was intended to create peace between Germany and Bohemia. However, the engagement ended within a year. Despite this, Kunigunde's brother, Wenceslaus married Hertmann's sister, Judith of Habsburg in 1285. Kunigunde's sister Agnes followed suit and married Rudolf II, Duke of Austria, brother of Hartmann.