^It is also possible that Princess Adeliza was William’s eldest daughter.
^James Panton. Historical Dictionary of the British Monarchy. Page 93.
^Lives of the Princesses of England from the Norman Conquest by Mary Anne Everett Green. Pages 1–13.
^Kenneth J. Panton: Historical Dictionary of the British Monarchy, Scarecrow Press, 2011, ISBN 978-0810857797
^William M. Aird. Robert `Curthose', Duke of Normandy (C. 1050-1134). The acclaimed biography of the eldest son of William the Conqueror, whose failure to secure the kingdom of England has overshadowed his role in capturing Jerusalem during the First Crusade.
^Churches and Churchmen in Medieval Europe by C. N. L. Brooke
^The history of Normandy and of England till 1101, Volume 3 by Francis Palgrave. Page 526.