Agnes of Merania (1215–1263)
…Her younger sister Adelaide (d. 1279) married Count Hugh III of Chalon and succeeded her brother Otto as Countess of Burgundy. In 1229 she married Frederick of Babenberg, son and heir of Duke Leopold VI of Austria. Her husband, who was known as "the Quarrelsome", had just divorced his first wife Eudokia Laskarina…