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Family:
Marriage:
Bibliography
  1. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 04 Dacre-Dysart. London: St Catherine Press, 1916. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Vol 4 also available at http://archive.org/completepeerageo04byucoka Information from this source tagged as [Ref: CP IV [Ap][p0-9].*].
  2. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 05 E-Goojerat. 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 V [Ap][p0-9].*].
  3. 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].*].
  4. Clutterbuck, Robert, History and Antiquities of the County of Hertford, London: Nichols, Son, and Bentley, 1815-27, v1-3. Available at https://familysearch.org/search/catalog/188626. Information from this source tagged as [Ref: Clutterbuck Hertford v[1-3]p[0-9]*].
  5. Foss, Edward, Biographia Juridica, Biographical Dictionary of the Judges of England, London: John Murray, 1870. Available at https://books.google.com/books?id=O0oBAAAAQAAJ Information from this source tagged as [Ref: Foss Judges p[0-9]*].
  6. Richardson, Douglas, Royal Ancestry. Salt Lake City, Utah: Douglas Richardson, 2013. NYPL JFF 16-1184 v1-5 Information from this source tagged as [Ref: Richardson RoyalAnc v2p[0-9]*].
  7. 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 birth and parent Information
date:
second son [Ref: CP V p116f, CP V p130],
parents:
[Ref: CP IV AppH p669, CP V p116f, CP V p130, Richardson RoyalAnc v2p178, Richardson RoyalAnc v2p512],
father:
[Ref: Foss Judges p103],
brother:
Geoffrey Earl of Essex [Ref: CP V p128]
Sources for death Information
date:
[Ref: CP V p116f, CP V p132, CP VI p459, Richardson RoyalAnc v2p515]
1226/7 [Ref: CP IV AppH p669 (with corr in XIV p294)]
1228 [Ref: CP IV AppH p660]
Sources for burial Information
place:
[Ref: CP V p132, Richardson RoyalAnc v2p515]
Sources with Information about marriage to Christine FITZ ROBERT
date:
before 18 Nov 1220 [Ref: CP V p132, Richardson RoyalAnc v2p515]
first marriage of Christian [Ref: Richardson RoyalAnc v2p650],
names:
[Ref: CP V p116f, Clutterbuck Hertford v2p277, Clutterbuck Hertford v2p422, Sanders Baronies p12(9)]
William & dau Robert fitz Walter [Ref: Sanders Baronies p71(7)]
Research Notes:
5th Earl of Essex, of Earldom cr 1156 [Ref: CP V p130]
6th Earl of Essex [Ref: Richardson RoyalAnc v2p512, Richardson RoyalAnc v2p650]

Knt, of Aylesbury, Buckinghamshire, Moreton Hampstead, Devon, Gussage St Michael, Dorset, Wellsworth, Hampshire, Berkhampstead, Hertfordshire, Cherhill, Wiltshire, etc [Ref: Richardson RoyalAnc v2p515]

1216: heir to his older brother Geoffrey [Ref: Richardson RoyalAnc v2p515]

brother and heir of Geoffrey de Mandeville [Ref: CP V p130, Sanders Baronies p12(9)]

d.s.p [Ref: CP IV AppH p669, CP V p116f, CP V p132]

heir was his sister, Maud [Ref: CP IV AppH p660]



Pedigree of William De Mandeville, Earl Of Essex
          /-----Piers De LUTEGARESHALE
 /-----Geoffrey FITZ PIERS, Earl Of Essex
|         \-----Maud
William De Mandeville, Earl Of Essex
|                                    /-----William De SAY
|                           /-----Jordan De SAY
|                          |        |                  /-----Robert De Grentmesnil
|                          |        |         /-----Hugh De Grantmesnil, Baron Of Leicester
|                          |        |        |        |         /-----Girole De Echafour
|                          |        |        |         \-----Hawise De Echafour
|                          |        |        |                  \-----Gisela De Bastenburgh
|                          |         \-----Agnes De GRANDMESNIL
|                          |                 |                  /-----Ivo I Count Of Beaumont
|                          |                 |         /-----Ivo II Count Of Beaumont
|                          |                 |        |         \-----Emma
|                          |                  \-----Adeliza Of Beaumont
|                          |                           \-----Judith
|                  /-----William De SAY
|                 |        |                  /-----Rainfred De RUMILLY
|                 |        |         /-----Robert De RUMILLY, Baron Of Skipton
|                 |         \-----Lucy De RUMILLY
|         /-----William De SAY
|        |        |                  /-----Geoffrey De MANDEVILLE, Baron Of Pleshy
|        |        |         /-----William De MANDEVILLE, Baron Of Pleshy
|        |        |        |         \-----Athelaise
|        |         \-----Beatrice De MANDEVILLE
|        |                 |                  /-----Hubert De Ryes
|        |                 |         /-----Eudo De RIE, Dapifer
|        |                  \-----Margaret RIE
|        |                          |                           /-----Godfrey Count Of Brionne
|        |                          |                  /-----Gilbert Count Of Brionne
|        |                          |         /-----Richard FITZ GILBERT De CLARE, Baron Of Clare
|        |                           \-----Rohais
|        |                                   |                  /-----Osbern De Bolbec, Seigneur Of Longueville
|        |                                   |         /-----Walter Giffard Lord Of Longueville
|        |                                   |        |         \-----Wevie
|        |                                    \-----Rohese GIFFARD
|        |                                            |         /-----Gerard De FLEITELL
|        |                                             \-----Ermengarde FLATEL
 \-----Beatrice De SAY
         |                                                      /-----Crinan The Thane Abbot Of Dunkeld
         |                                             /-----Donnchad (Duncan I) Mac CRINAN, King Of Scots
         |                                            |         \-----Bethoc
         |                                    /-----Mael Coluim Ceann Moir (Malcolm III) Canmore Mac DONNCHAD, King Of Scots
         |                                   |        |         /-----Sigurd Digera Earl Of Northumbria
         |                                   |         \-----Sibylia Of Northumbria
         |                                   |                  \-----Aelflaed
         |                           /-----David I The Saint King Of Scots
         |                          |        |                  /-----Edmund Ironside King Of England
         |                          |        |         /-----Edward Athling The Exile
         |                          |        |        |         \-----Ealgyth
         |                          |         \-----Saint Margaret Of Scotland
         |                          |                 |         /-----Jaroslav I Grand Prince Of Kiev
         |                          |                  \-----Agatha
         |                          |                           \-----Ingegard
         |                  /-----Henry Of Huntingdon, Earl Of Huntingdon
         |                 |        |                           /-----Beorn
         |                 |        |                  /-----Sigurd Digera Earl Of Northumbria
         |                 |        |         /-----Waltheof II Earl Of Huntingdon
         |                 |        |        |        |         /-----Ealdred Of Bernicia
         |                 |        |        |         \-----Aelflaed
         |                 |         \-----Maud Of Huntingdon
         |                 |                 |                  /-----Eustace I Count Of Boulogne
         |                 |                 |         /-----Lambert Of Boulogne, Count Of Lens
         |                 |                 |        |         \-----Maud Of Louvain
         |                 |                  \-----Judith Of Lens
         |                 |                          |         /-----Robert I The Devil Duke Of Normandy
         |                 |                           \-----Adelaide Of Normandy
         |                 |                                    \-----Herleve Of Falaise
         |         /-----William The Lion King Of Scots
         |        |        |                                    /-----Rodulf De Warrene
         |        |        |                           /-----Ralph II De Warrene
         |        |        |                          |         \-----Beatrice De VASCOEUIL
         |        |        |                  /-----William De Warrene, Earl Of Surrey
         |        |        |                 |         \-----Emma
         |        |        |         /-----William II De Warrene, Earl Of Surrey
         |        |        |        |        |         /-----Gherbod The Fleming, Advocate Of St. Bertins
         |        |        |        |         \-----Gundred
         |        |         \-----Ada De WARENNE
         |        |                 |                           /-----Robert II The Pious King Of France
         |        |                 |                  /-----Henry I King Of France
         |        |                 |                 |         \-----Constance Of Provence
         |        |                 |         /-----Hugh Magnus Duke Of France
         |        |                 |        |        |         /-----Jaroslav I Grand Prince Of Kiev
         |        |                 |        |         \-----Anne Of Kiev
         |        |                 |        |                  \-----Ingegard
         |        |                  \-----Isabel De Vermandois, Countess Of Leicester
         |        |                          |                  /-----Eudes Count Of Vermandois
         |        |                          |         /-----Herbert IV Count Of Vermandois
         |        |                          |        |         \-----Parvie
         |        |                           \-----Adelaide De Vermandois, Countess Of Vermandois
         |        |                                   |         /-----Raoul III The Great Count Of Valois And Vexin
         |        |                                    \-----Adela De Valois
         |        |                                             \-----Adela
          \-----Aufrica



Descendants of William De Mandeville, Earl Of Essex
1. William De Mandeville, Earl Of Essex m. Christine FITZ ROBERT
m. Christine FITZ ROBERT father: Robert FITZ WALTER, Leader Of MC Barons mother: Gunnor De VALOINES