– 29 October 1266), married Henry, eldest son and heir presumptive of the Holy Roman Emperor Frederick II, then after he died, married King Ottokar II of Bohemia. Agnes of Austria (19 February 1205 – 29 August 1226), married Albert I, Duke of Saxony Leopold of Austria (1207–1216) died when he climbed a tree and fell at Klosterneuburg Henry II, Duke of Mödling (1208 – 28 November 1228), married Agnes of Thuringia; their only daughter, Gertrudis, was the general heiress of the House of Babenberg after the death of her uncle Gertrude of Austria (1210–1241), married Henry Raspe, Landgrave of Thuringia Frederick II, Duke of Austria (25 April 1211 – 15 June 1246) Constantia of Austria (6 April 1212 – 5 June 1243), married Henry III, Margrave of Meissen See also List of rulers of Austria List of Marshals of Austria References Sources External links Leopold VI., Herzog at AEIOU |- Leopold VI of Austria Leopold VI of Austria 13th-century dukes of Austria Leopold 6 Leopold 6 Christians of the Fifth Crusade People of the Albigensian Crusade