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Marriage:
Bibliography
  1. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 09, Moels-Nugent. London: St Catherine Press, 1936. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP IX [Ap][p0-9].*].
  2. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 06 Gordon-Huntley. London: St Catherine Press, 1926. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP VI [Ap][p0-9].*].
  3. Phillips, Chris, Corrections and Additions to the Complete Peerage, http://www.medievalgenealogy.org.uk/cp/index.shtml Information from this source tagged as [Ref: CP++ .*].
  4. Keats-Rohan, K.S.B., Domesday Descendants, A Prosopography of Persons Occurring in English Documents 1066-1166. Vol II: Pipe Rolls to Cartae Baronum. Bury St Edmunds, Suffolk: Boydell Press, 2002. NYPL ARF 03-4178 vol 2. Corrections at http://users.ox.ac.uk/~prosop/domesday-descendants-corrigenda.pdf Information from this source tagged as [Ref: Keats-Rohan DD p[0-9]*].
  5. Sanders, I. J., English Baronies, A Study of Their Origin and Descent 1086-1327. Oxford: Clarendon Press, 1960. Information from this source tagged as [Ref: Sanders Baronies p[0-9]*].

Sources for death Information
date:
before 1192 [Ref: CP VI p456 (with corr in XIV p381)]
Sources with Information about marriage to Cicely FITZJOHN
date:
second marriage of Cicely [Ref: CP++ Hereford 7/18/2003 (CP VI p456), CP++ Munchensy 7/18/2003 (CP IX p419(d)), Keats-Rohan DD p854, Sanders Baronies p144]
Sources with Inaccurate marriage information
date:
third marriage of Cicely [Ref: CP IX p419(d), CP VI p456 (with corr in XIV p381)]
Research Notes:



Pedigree of William De Poitou
William De Poitou



Descendants of William De Poitou
1. William De Poitou m. Cicely FITZJOHN
m. Cicely FITZJOHN father: Payne FITZJOHN mother: Sibyl De LACY