Duke of Aquitaine
In 1019, she married Duke William V of Aquitaine by whom she had three children: William VII, Duke of Aquitaine, William VIII, Duke of Aquitaine and Agnes, Holy Roman Empress. William died on 31 January 1030, leaving his widow and their three young children, plus the three surviving children from his first two marriages. While married to William, Agnes gave many gifts to the abbey of Cluny.