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Family:
Marriage: Children:
  1. Sir John De St JOHN, Baron Of Basing Birth: 1 Death: Abt 20 Sep 1302
  2. William De St JOHN Birth: 2

Bibliography
  1. Bevan, Rosie, Corrections to K. S. B. Keats-Rohan's Domesday Series, Volume II: Domesday Descendants. Version 7, 25 Sep 2005. Available at http://www.fmg.ac/Projects/Domesday/ Information from this source tagged as [Ref: Bevan DD++ p[0-9]*].
  2. 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]*].
  3. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 11, Ridley-Sinclair. London: St Catherine Press, 1949. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/27141 Information from this source tagged as [Ref: CP XI [Ap][p0-9].*].
  4. Richardson, Douglas, Cantelowe family pedigree. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 12/14/2010. Subject: Parentage of Sir William de Cantelowe, Steward of the King's Household (died 1239). Available at https://groups.google.com/g/soc.genealogy.medieval/c/WgmTUD7Dly8/m/48vRzVf2r9wJ. Author address: royalancestry at msn dot com. Information from this source tagged as [Ref: Douglas Richardson SGM 12/14/2010-121954].
  5. 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]*].
  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 v4p[0-9]*].
  7. Round, J H, Families of St John and of Port, in The Genealogist vol 16, 1900. Journal available at https://familysearch.org/search/catalog/14199. Available at http://archive.org/details/genealogist16lond. Information from this source tagged as [Ref: Round StJohn p[0-9]*].
  8. 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]*].
  9. Weis, Frederick Lewis, Walter Lee Sheppard, Jr, David Faris, Ancestral Roots of Certain American Colonists who came to America before 1700, 7th Edition, Baltimore: Genealogical Publishing Co, 1992. Information from this source tagged as [Ref: Weis AR7 #[0-9][0-9]*[A-Z]*].

Sources for birth and parent Information
date:
second son [Ref: Bevan DD++ p691, CP XI p322],
parents:
[Ref: Bevan DD++ p691, Burke Peerage p1766, CP XI p322, Richardson RoyalAnc v4p316],
father:
[Ref: Round StJohn p6, Sanders Baronies p9]
Sources for death Information
date:
1266 [Ref: Douglas Richardson SGM 12/14/2010-121954]
1267 [Ref: Bevan DD++ p691, Sanders Baronies p9]
between 11 Mar 1266/7 and 25 Mar 1266/7 [Ref: CP XI p323]
shortly before 25 Mar 1266/7 [Ref: Richardson RoyalAnc v4p317]
Sources with Inaccurate death Information
date:
1269 [Ref: Weis AR7 #262]
Sources with Information about marriage to Agnes De CAUNTELO
date:
first marriage of Agnes [Ref: CP XI p323, Richardson RoyalAnc v2p81],
child:
[Ref: Burke Peerage p1766, CP XI p323, Douglas Richardson SGM 12/14/2010-121954, Richardson RoyalAnc v4p317, Weis AR7 #262]
Sources with Inaccurate marriage information
child:
William de St JOHN (#175466) [Ref: Burke Peerage p1766]
Research Notes:
of Basing and Chawton, Hampshire, West Shefford, Berkshire, Halnaker, Barnham, Goodwood, and Walberton, Sussex, etc [Ref: Richardson RoyalAnc v4p317]
of Basing, Hampshire [Ref: Weis AR7 #262]

heir of his father [Ref: Bevan DD++ p691, CP XI p322, Richardson RoyalAnc v4p317]

inherited Barony of Basing from father [Ref: Sanders Baronies p9]

Keeper of Portchester and Farnham Castles [Ref: Richardson RoyalAnc v4p317]

Constable of Forestre Castle [Ref: Weis AR7 #262]



Pedigree of Sir Robert De St JOHN, Baron Of Basing
                                              /-----(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
|                                                               /-----Ralph II De TOENI, Seigneur Of Tonsi And Conches
|                                                      /-----Roger I De TOENI
|                                             /-----Ralph III De TOENI, Baron Of Flamstead
|                                            |         \-----Godehildie
|                                    /-----Ralph IV De TOENI, Baron Of Flamstead
|                                   |        |                  /-----Amauri III De MONTFORT
|                                   |        |         /-----Simon I De MONTFORT, Seigneur Of Montfort L'Amau
|                                   |        |        |         \-----Bertrade De GOMMETZ
|                                   |         \-----Isabel De MONTFORT
|                                   |                 |         /-----Hugues I Bardoul Lord Of Broyes And Beaufort
|                                   |                  \-----Isabel Of Broyes
|                                   |                           \-----Alvidis
|                           /-----Roger III De TOENI, Baron Of Flamstead
|                          |        |                           /-----Beorn
|                          |        |                  /-----Sigurd Digera Earl Of Northumbria
|                          |        |         /-----Waltheof II Earl Of Huntingdon
|                          |        |        |        |         /-----Ealdred Of Bernicia
|                          |        |        |         \-----Aelflaed
|                          |         \-----Alice Of Northumberland
|                          |                 |                  /-----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
|                  /-----Ralph V De TOENI, Baron Of Flamstead
|                 |        |                                    /-----Baldwin V Count Of Flanders
|                 |        |                           /-----Baldwin VI De MONS, Count Of Flanders
|                 |        |                          |         \-----Adelaide Of France
|                 |        |                  /-----Baldwin II Count Of Hainault
|                 |        |                 |        |         /-----Gerhard II Count Of Egisheim
|                 |        |                 |         \-----Richilde Countess Of Hainault
|                 |        |                 |                  \-----Berta
|                 |        |         /-----Baldwin III Count Of Hainault
|                 |        |        |        |                  /-----Lambert II The Belted Count Of Louvain
|                 |        |        |        |         /-----Henry II Of Brabant, Count Of Lorraine
|                 |        |        |        |        |         \-----Oda Of Lorraine
|                 |        |        |         \-----Ida Of Louvain
|                 |        |        |                 |         /-----Eberhard Of Betuew And Teisterbant
|                 |        |        |                  \-----Adelaide Of Betuew
|                 |         \-----Ida (Gertrude) Of Hainault
|                 |                 |                           /-----Gerard Flameus Count Of Teirterbant
|                 |                 |                  /-----Dietrich Flameus Count In The Velux
|                 |                 |         /-----Gerald I Count Of Guelders And Wassenberg
|                 |                  \-----Yolande Of Guelders
|         /-----Roger IV De TOENI, Baron Of Flamstead
|        |        |                                             /-----Thorold Seigeur Of Pont-Audemer
|        |        |                                    /-----Humphrey De Vieilles
|        |        |                                   |         \-----Aveline
|        |        |                           /-----Roger De Beaumont
|        |        |                          |         \-----Aubreye De La Haie
|        |        |                  /-----Sir Robert De Beaumont, Earl Of Leicester
|        |        |                 |        |                  /-----Hugo I Count Of Meulen
|        |        |                 |        |         /-----Waleran Count Of Meulan
|        |        |                 |        |        |         \-----Oda Of Valois
|        |        |                 |         \-----Adelise Of Meulan
|        |        |                 |                  \-----Ode
|        |        |         /-----Sir Robert II De Beaumont, Earl Of Leicester
|        |        |        |        |                           /-----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
|        |         \-----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
|        |                 |        |        |                  /-----Osbern De Crepon, Steward Of Normandy
|        |                 |        |        |         /-----William Fitz Osbern, Earl Of Hereford
|        |                 |        |        |        |         \-----Emma Abbess Of St. Amand
|        |                 |        |         \-----Emma Fitz Osbern
|        |                 |        |                 |         /-----Roger I De TOENI
|        |                 |        |                  \-----Adelise De TONI
|        |                 |        |                           \-----Godehildie
|        |                  \-----Amicia De Gael
 \-----Godeheut
         |                                                      /-----Raoul IV Vicount Of Maine
         |                                             /-----Raoul V Vicount Of Beaumont And Maine
         |                                            |         \-----Eremburgie Of Cluny
         |                                    /-----Hubert Vicount Of Beaumont And Maine
         |                                   |        |         /-----Etienne De Montevrault
         |                                   |         \-----Emma De Montevrault, Dame De Lude
         |                                   |                  \-----Adelberge
         |                           /-----Raoul VII Vicount Of Fresnay, Beaumont, And St Suz
         |                          |        |                  /-----Renaud I Count Of Nevers
         |                          |        |         /-----William I Count Of Nevers
         |                          |        |        |         \-----Alvais Of France
         |                          |         \-----Ermengarde Of Nevers
         |                          |                 |         /-----Renaud Count Of Tonnerre
         |                          |                  \-----Ermengarde Of Tonnerre
         |                          |                           \-----Helvis/Erwig
         |                  /-----Roscelin De BEAUMONT, Viscount Of Maine
         |                 |        |                           /-----Guy I Lord Of Laval
         |                 |        |                  /-----Hamon Lord Of Laval
         |                 |        |                 |         \-----Bertha De TOENI
         |                 |        |         /-----Guy II Sire De Laval
         |                 |        |        |         \-----Hersende
         |                 |         \-----Adenor Of Laval
         |                 |                 |                  /-----Herluin De Contreville
         |                 |                 |         /-----Robert De Mortain, Count Of Mortain In Avranchi
         |                 |                 |        |         \-----Herleve Of Falaise
         |                 |                  \-----Denise Of Mortain
         |                 |                          |         /-----Roger De Montgomery, Earl Of Shrewsbury
         |                 |                           \-----Maud De Montgomery
         |                 |                                    \-----Mabel De Belesme
         |         /-----Richard I De BEAUMONT, Viscount Of Maine
         |        |        |                                    /-----Richard II The Good Duke Of Normandy
         |        |        |                           /-----Robert I The Devil Duke Of Normandy
         |        |        |                          |         \-----Judith Of Brittany
         |        |        |                  /-----William The Conqueror King Of England
         |        |        |                 |        |         /-----Fulbert Of Falaise
         |        |        |                 |         \-----Herleve Of Falaise
         |        |        |                 |                  \-----Duxia
         |        |        |         /-----Henry I Beauclerc King Of England
         |        |        |        |        |                  /-----Baldwin IV The Bearded Count Of Flanders
         |        |        |        |        |         /-----Baldwin V Count Of Flanders
         |        |        |        |        |        |         \-----Ogive Of Luxembourg
         |        |        |        |         \-----Maud Of Flanders
         |        |        |        |                 |         /-----Robert II The Pious King Of France
         |        |        |        |                  \-----Adelaide Of France
         |        |        |        |                           \-----Constance Of Provence
         |        |         \-----Constance
          \-----Constance De BEAUMONT
                  |         /-----Richard II Seigneur of l'Aigle
                   \-----Lucie De L'AIGLE
                            \-----Beatrice



Descendants of Sir Robert De St JOHN, Baron Of Basing
1. Sir Robert De St JOHN, Baron Of Basing m. Agnes De CAUNTELO
m. Agnes De CAUNTELO father: Sir William De CANTELOU, Baron Of Eaton Bray mother: Millicent De GOURNAY

2nd generation

2. Sir John De St JOHN, Baron Of Basing m. Alice FITZ REYNOLD
m. Alice FITZ REYNOLD father: Sir Reynold FITZ PIERS mother: Alice STANFORD

3rd generation

4. Sir John De St JOHN, Lord St John m1. Isabel COURTENAY m2. Alice WALLIS
m. Isabel COURTENAY father: Sir Hugh De COURTENAY, Baron Of Oakhampton mother: Eleanor Le DESPENSER
m. Alice WALLIS father: Sir John WALLIS
5. Sir Edward De St JOHN m. Eve DAWTRY
m. Eve DAWTRY father: John DAWTRY mother: Elizabeth De La STANE
6. Agnes De St JOHN m. Sir Hugh De COURTENAY, Earl Of Devon
m. Sir Hugh De COURTENAY, Earl Of Devon father: Sir Hugh De COURTENAY, Baron Of Oakhampton mother: Eleanor Le DESPENSER

4th generation

10. Margaret St JOHN m. Sir John BEAUCHAMP, Lord Beauchamp Of Somerset
m. Sir John BEAUCHAMP, Lord Beauchamp Of Somerset father: Sir John BEAUCHAMP, Lord Beauchamp Of Somerset mother: Joan CHENDUIT
11. Hugh De St JOHN, Lord St John m. Mirabel WAKE
m. Mirabel WAKE father: Sir Hugh WAKE mother: Joan De BOLANY
12. Sir Edward St JOHN m. Anastasia D'ATON
m. Anastasia D'ATON father: Sir William D'ATON, Lord Aton mother: Isabel De PERCY
18. Sir Hugh De COURTENAY, Earl Of Devon m. Margaret De BOHUN
m. Margaret De BOHUN father: Humphrey VIII De BOHUN, Earl Of Hereford And Essex mother: Elizabeth PLANTAGENET
20. Sir Thomas De COURTENAY m. Muriel De MOELS
m. Muriel De MOELS father: Sir John De MOELS, Lord Moels mother: Joan LOVEL
21. Elizabeth COURTENAY m. Bartholomew De L'ISLE, Lord Lisle
m. Bartholomew De L'ISLE, Lord Lisle father: John De L'ISLE, Lord Lisle mother: Pernel

5th generation

23. Cecily BEAUCHAMP m1. Sir Gilbert De TURBERVILLE m2. Sir Roger SEYMOUR
m. Sir Gilbert De TURBERVILLE father: Payne De TURBERVILLE mother: Gwenllian TALBOT
m. Sir Roger SEYMOUR father: William SEYMOUR
24. Eleanor BEAUCHAMP m. Sir John De MERIET
m. Sir John De MERIET father: George MERIET mother: Isabel
27. Margaret De St JOHN m. John De St PHILIBERT, Lord St Philibert
m. John De St PHILIBERT, Lord St Philibert father: Sir John De St PHILIBERT mother: Ada De BOTETOURTE
29. Isabel De St JOHN, Baroness St John m1. Henry De BURGHERSH m2. Sir Luke De POYNINGS, Lord Poynings m3. Sir Thomas WORTING
m. Henry De BURGHERSH father: Sir Bartholomew De BURGHERSH, Lord Burghersh mother: Elizabeth De VERDUN
m. Sir Luke De POYNINGS, Lord Poynings father: Sir Thomas De POYNINGS mother: Agnes De ROKESLEY
m. Sir Thomas WORTING father: Thomas WORTING
30. Margaret St JOHN m. Sir Thomas BROUNFLETE
m. Sir Thomas BROUNFLETE father: William BROUNFLETE
31. Sir Hugh De COURTENAY, Orig K.G. m. Elizabeth De VERE
m. Elizabeth De VERE father: John De VERE, Earl Of Oxford mother: Maud De BADLESMERE
33. Elizabeth De COURTENAY m1. John De VERE m2. Sir Andrew LUTTERELL
m. John De VERE father: John De VERE, Earl Of Oxford mother: Maud De BADLESMERE
m. Sir Andrew LUTTERELL father: Sir John LUTTRELL mother: Joan
34. Margaret COURTENAY m1. Sir Theobald GRENVILLE m2. John De COBHAM, Lord Cobham
m. Sir Theobald GRENVILLE
m. John De COBHAM, Lord Cobham father: Sir John De COBHAM, Lord Cobham mother: Joan BEAUCHAMP
35. Sir Edward COURTENAY m. Emmeline DAUNEY
m. Emmeline DAUNEY father: Sir John DAUNEY mother: Sybil TREVERBIN
38. Sir Philip COURTENAY m. Anne WAKE
m. Anne WAKE father: Sir Thomas WAKE mother: Alice PATSHULL
44. Margaret COURTENAY m. Sir Thomas PEVERELL
m. Sir Thomas PEVERELL father: Sir Hugh PEVERELL mother: Margaret COBHAM
46. Muriel De COURTENAY m. Sir John De DINHAM, Lord Dinham
m. Sir John De DINHAM, Lord Dinham father: Sir John De DINHAM, Lord Dinham mother: Margaret De BOTREAUX
47. John De L'ISLE, Lord Lisle m. Maud
m. Maud