Gisela was a Unrochinger noblewoman and the mother of Regelinda of Zürich, Duchess of Swabia.
Her father was Liuto (Liutold) von Rheinau, attested as bailiff of the Rheinau monastery in 878, a son of Count Liutold, who married Judith "von Balingen".
[1][2] Judith was the daughter of Eberhard of Friuli and Gisela, daughter of Louis the Pious and Judith of Bavaria.
[3] She married her first cousin, Eberhard of Sülichgau, and they had at least two daughters, Judith (who married Arnulf, Duke of Bavaria, and was the mother of Eberhard and Judith.
[5][6] Other sources state that Gisela's father was in fact Unruoch III of Friuli, a Unruoching, himself of Carolingian descent.