Tham khảo Guillaume I xứ Normandie

  1. Detlev Schwennicke, Europäische Stammtafeln: Stammtafeln zur Geschichte der Europäischen Staaten, Neue Folge, Band III Teilband 1 (Marburg, Germany: J. A. Stargardt, 1984), Tafel 79
  2. David C. Douglas, 'The Earliest Norman Counts', The English Historical Review, Vol. 61, No. 240 (May, 1946), p. 130
  3. David C. Douglas, 'The Earliest Norman Counts', The English Historical Review, Vol. 61, No. 240 (May, 1946), p. 130
  4. David Crouch, The Normans: The History of a Dynasty, (London: Hambledon Continuum, 2007), p. 14.
  5. The Normans in Europe, ed. & trans. Elisabeth van Houts (Manchester; New York: Manchester University Press, 2000), pp. 31, 41, 182
  6. Eleanor Searle, Predatory Kinship and the Creation of Norman Power, 840–1066 (Berkeley: University of California Press, 1988), p. 45
  7. François Neveux, A Brief History of the Normans, trans. Howard Curtis (London: Constable & Robbinson, Ltd, 2008), p. 62 & n. 111
  8. David C. Douglas, 'Rollo of Normandy', The English Historical Review, Vol. 57, No. 228 (Oct., 1942), p. 422
  9. Orderic Vitalis, The Ecclesiastical History of Orderic Vitalis, ed. Marjorie Chibnall, Vol. II (Oxford: Clarendon Press, 1993), P. 7
  10. Douglas, 'Rollo of Normandy', p. 417
  11. K.S.B. Keats-Rohan, 'Poppa of Bayeux and Her Family', The American Genealogist, vol. 72, no. 4 (July–October 1997), p. 198
  12. Crouch, p. 9
  13. Vitalis, p. 67 (Citing William of Jumièges, Book II, ch. 12[18])