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Family:
Bibliography
  1. Burke, Sir John Bernard, Genealogical and Heraldic History of the Peerage Baronetage and Knightage. 99th edition. London: Burke's Peerage, 1949. Available at http://archive.org/details/burkesgenealogic1949unse. Information from this source tagged as [Ref: Burke Peerage [cx0-9]*].
  2. 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 v4p[0-9]*].

Sources for birth and parent Information
date:
second son [Ref: Burke Peerage p1766],
parents:
[Ref: Burke Peerage p1766, Richardson RoyalAnc v4p317]
Research Notes:
of Faumont, co Glamorgan [Ref: Burke Peerage p1766]



Pedigree of William De St JOHN
                                                       /-----(Unk) De PORT
                                              /-----Hugh De PORT, Baron Of Basing
                                     /-----Henry De PORT, Baron Of Basing
                                    |         \-----Orence
                            /-----John De PORT, Baron Of Basing
                           |         \-----Hawise
                   /-----Adam De PORT, Baron Of Basing
                  |         \-----Maud
          /-----William De St JOHN, Baron Of Basing
         |        |                  /-----Hugh De ORVAL
         |        |         /-----Rainald De ORVAL
         |         \-----Mabel De ORVAL
         |                 |                  /-----Ralph De St JOHN
         |                 |         /-----Roger De St JOHN
         |                  \-----Muriel De St JOHN
         |                          |         /-----Robert De La HAY, Lord Of Hanlac
         |                           \-----Cecily De La HAIE
         |                                   |                  /-----Colswein Of Lincoln, Baron Of Brattlesby
         |                                   |         /-----Picot Of Lincoln, Baron Of Brattlesby
         |                                    \-----Muriel Of Lincoln
         |                                             \-----Beatrice
 /-----Sir Robert De St JOHN, Baron Of Basing
|        |                                                      /-----Roger I De TOENI
|        |                                             /-----Ralph III De TOENI, Baron Of Flamstead
|        |                                            |         \-----Godehildie
|        |                                    /-----Ralph IV De TOENI, Baron Of Flamstead
|        |                                   |        |         /-----Simon I De MONTFORT, Seigneur Of Montfort L'Amau
|        |                                   |         \-----Isabel De MONTFORT
|        |                                   |                  \-----Isabel Of Broyes
|        |                           /-----Roger III De TOENI, Baron Of Flamstead
|        |                          |        |                  /-----Sigurd Digera Earl Of Northumbria
|        |                          |        |         /-----Waltheof II Earl Of Huntingdon
|        |                          |        |        |         \-----Aelflaed
|        |                          |         \-----Alice Of Northumberland
|        |                          |                 |         /-----Lambert Of Boulogne, Count Of Lens
|        |                          |                  \-----Judith Of Lens
|        |                          |                           \-----Adelaide Of Normandy
|        |                  /-----Ralph V De TOENI, Baron Of Flamstead
|        |                 |        |                           /-----Baldwin VI De MONS, Count Of Flanders
|        |                 |        |                  /-----Baldwin II Count Of Hainault
|        |                 |        |                 |         \-----Richilde Countess Of Hainault
|        |                 |        |         /-----Baldwin III Count Of Hainault
|        |                 |        |        |        |         /-----Henry II Of Brabant, Count Of Lorraine
|        |                 |        |        |         \-----Ida Of Louvain
|        |                 |        |        |                  \-----Adelaide Of Betuew
|        |                 |         \-----Ida (Gertrude) Of Hainault
|        |                 |                 |                  /-----Dietrich Flameus Count In The Velux
|        |                 |                 |         /-----Gerald I Count Of Guelders And Wassenberg
|        |                 |                  \-----Yolande Of Guelders
|        |         /-----Roger IV De TOENI, Baron Of Flamstead
|        |        |        |                                    /-----Humphrey De Vieilles
|        |        |        |                           /-----Roger De Beaumont
|        |        |        |                          |         \-----Aubreye De La Haie
|        |        |        |                  /-----Sir Robert De Beaumont, Earl Of Leicester
|        |        |        |                 |        |         /-----Waleran Count Of Meulan
|        |        |        |                 |         \-----Adelise Of Meulan
|        |        |        |                 |                  \-----Ode
|        |        |        |         /-----Sir Robert II De Beaumont, Earl Of Leicester
|        |        |        |        |        |                  /-----Henry I King Of France
|        |        |        |        |        |         /-----Hugh Magnus Duke Of France
|        |        |        |        |        |        |         \-----Anne Of Kiev
|        |        |        |        |         \-----Isabel De Vermandois, Countess Of Leicester
|        |        |        |        |                 |         /-----Herbert IV Count Of Vermandois
|        |        |        |        |                  \-----Adelaide De Vermandois, Countess Of Vermandois
|        |        |        |        |                           \-----Adela De Valois
|        |        |         \-----Margaret De BEAUMONT
|        |        |                 |                           /-----Ralph De Gael, Earl Of Norfolk
|        |        |                 |                  /-----Ralph De Gael De Montfort, Earl Of Norfolk
|        |        |                 |                 |         \-----Getha
|        |        |                 |         /-----Ralph De MONTFORT, Seigneur Of Montfort-Gael
|        |        |                 |        |        |         /-----William Fitz Osbern, Earl Of Hereford
|        |        |                 |        |         \-----Emma Fitz Osbern
|        |        |                 |        |                  \-----Adelise De TONI
|        |        |                  \-----Amicia De Gael
|         \-----Godeheut
|                 |                                             /-----Raoul V Vicount Of Beaumont And Maine
|                 |                                    /-----Hubert Vicount Of Beaumont And Maine
|                 |                                   |         \-----Emma De Montevrault, Dame De Lude
|                 |                           /-----Raoul VII Vicount Of Fresnay, Beaumont, And St Suz
|                 |                          |        |         /-----William I Count Of Nevers
|                 |                          |         \-----Ermengarde Of Nevers
|                 |                          |                  \-----Ermengarde Of Tonnerre
|                 |                  /-----Roscelin De BEAUMONT, Viscount Of Maine
|                 |                 |        |                  /-----Hamon Lord Of Laval
|                 |                 |        |         /-----Guy II Sire De Laval
|                 |                 |        |        |         \-----Hersende
|                 |                 |         \-----Adenor Of Laval
|                 |                 |                 |         /-----Robert De Mortain, Count Of Mortain In Avranchi
|                 |                 |                  \-----Denise Of Mortain
|                 |                 |                           \-----Maud De Montgomery
|                 |         /-----Richard I De BEAUMONT, Viscount Of Maine
|                 |        |        |                           /-----Robert I The Devil Duke Of Normandy
|                 |        |        |                  /-----William The Conqueror King Of England
|                 |        |        |                 |         \-----Herleve Of Falaise
|                 |        |        |         /-----Henry I Beauclerc King Of England
|                 |        |        |        |        |         /-----Baldwin V Count Of Flanders
|                 |        |        |        |         \-----Maud Of Flanders
|                 |        |        |        |                  \-----Adelaide Of France
|                 |        |         \-----Constance
|                  \-----Constance De BEAUMONT
|                          |         /-----Richard II Seigneur of l'Aigle
|                           \-----Lucie De L'AIGLE
|                                    \-----Beatrice
William De St JOHN
|                                    /-----William De CANTELU
|                           /-----Walter De CANTELOU
|                  /-----Sir William De CANTELOU, Baron Of Eaton Bray
|                 |         \-----Amice
|         /-----Sir William De CANTELOU, Baron Of Eaton Bray
|        |        |                  /-----Audulf De BRACI
|        |        |         /-----Audulf De BRACI
|        |         \-----Mesceline De BRACI
 \-----Agnes De CAUNTELO
         |                                             /-----Hugh De GOURNAY
         |                                    /-----Gerold De GOURNAY, Lord Of Gournay-En-Bray
         |                                   |        |         /-----Gerard De FLEITELL
         |                                   |         \-----Basilia De FLEITELL
         |                           /-----Hugh De GOURNAY
         |                          |        |                  /-----Ralph II De Warrene
         |                          |        |         /-----William De Warrene, Earl Of Surrey
         |                          |        |        |         \-----Emma
         |                          |         \-----Edith De WARENNE
         |                          |                 |         /-----Gherbod The Fleming, Advocate Of St. Bertins
         |                          |                  \-----Gundred
         |                  /-----Hugh De GOURNAY
         |                 |        |                           /-----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
         |                 |         \-----Beatrice Of Vermandois
         |                 |                 |                  /-----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
         |         /-----Hugh De GOURNAY
         |        |        |                                    /-----Hugh Seigneur De Boves
         |        |        |                           /-----Dreux De BOVES
         |        |        |                  /-----Enguerrand I De COUCY, Count Of Amiens
         |        |        |                 |        |         /-----Alberic Seigneur De Coucy
         |        |        |                 |         \-----Adele De Coucy
         |        |        |                 |                  \-----Adele
         |        |        |         /-----Thomas De COUCY, Count Of Anvers
         |        |        |        |        |                  /-----Giselbert Count Of Roucy
         |        |        |        |        |         /-----Lutaud Seigneur De Marle
         |        |        |        |        |        |         \-----(Unk Dau)
         |        |        |        |         \-----Ade De ROUCY, Dame De Marle
         |        |        |        |                  \-----Mathilde
         |        |         \-----Melisende De COUCY
         |        |                 |         /-----Guy De CRECY En LAONNOIS
         |        |                  \-----Melisende De CRECY En LAONNOIS
          \-----Millicent De GOURNAY
                  |                                             /-----Eudes Count Of Dammartin
                  |                                    /-----Hugh II Count Of Dammartin
                  |                           /-----Odo De DAMMARTIN
                  |                          |        |         /-----Richard FITZ GILBERT De CLARE, Baron Of Clare
                  |                          |         \-----Rohais
                  |                          |                  \-----Rohese GIFFARD
                  |                  /-----Alberic I De DAMMARTIN
                  |                 |        |                  /-----Hubert De Ryes
                  |                 |        |         /-----(Unk) De ST CLAIR
                  |                 |         \-----Basilia De St CLAIR
                  |         /-----Alberic II De DAMMARTIN, Count Of Dammartin
                  |        |         \-----(Unk)
                   \-----Julia De DAMMARTIN
                           |                                    /-----Hugh Butler Of France
                           |                           /-----Renaud Count Of Clermont
                           |                  /-----Hugh Count Of Clermont
                           |                 |         \-----Ermengardis
                           |         /-----Renaud Count Of Clermont
                           |        |        |                  /-----Hildouin II De Rameru
                           |        |        |         /-----Hildouin III De Rameru, Count Of Montdidier And Roucy
                           |        |        |        |         \-----Anonima
                           |        |         \-----Margaret De Roucy
                           |        |                 |         /-----Ebles I Count Of Rheims And Roucy
                           |        |                  \-----Adele De Roucy
                           |        |                           \-----Beatrix Of Hainault
                            \-----Maud Of Clermont
                                    |                           /-----Louis Of Montbeliard, Count Of Bar
                                    |                  /-----Thierry II Count Of Bar
                                    |                 |         \-----Sophia Countess Of Bar
                                    |         /-----Renaud I Count Of Bar
                                    |        |        |         /-----William I The Great Count Of Burgundy
                                    |        |         \-----Ermentrude Of Burgandy
                                    |        |                  \-----Stephanie Of Barcelona
                                     \-----Clemence Of Bar-Le-Duc
                                             |                  /-----Gerhard IV Count Of Alsatia, Duke Of Lorraine Mosel
                                             |         /-----Gerard I Of Lorraine, Count Of Vaudemont
                                             |        |         \-----Hedwig
                                              \-----Gisele De VAUDEMONT
                                                      |         /-----Gerard II Count Of Egisheim
                                                       \-----Helwide/Edith Of Egisheim
                                                                \-----Richarde



Descendants of William De St JOHN
1. William De St JOHN