Sophie of Hohenstaufen Parents Frederick Barbarossa Beatrice I, Countess of Burgundy Children Siblings Conrad II, Duke of Swabia Henry VI Beatrice Schwäbische Beatrice of Swabia Agnes von Staufen Frederick V, Duke of Swabia Philip of Swabia Otto I, Count of Burgundy Frederick VI, Duke of Swabia Partners William VI, Marquess of Montferrat