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Family:
Marriage:
Bibliography
  1. Altschul, Michael, A Baronial Family in Medieval England: The Clares, 1217-1314. Baltimore: John Hopkins Press, 1965. Dana Library (Rutgers Newark) CS439.C6285. Information from this source tagged as [Ref: Altschul CLARE [p#][0-9]*].
  2. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 03 Canonteigh-Cutts. London: St Catherine Press, 1913. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Vol 3 also available at http://archive.org/completepeerageo03coka Information from this source tagged as [Ref: CP III [Ap][p0-9].*].
  3. 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].*].
  4. 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++ .*].
  5. Phillips, Chris, Proposed Corrections and Additions to the Complete Peerage, http://www.medievalgenealogy.org.uk/cp/index.shtml Information from this source tagged as [Ref: CP++(proposed) .*].
  6. Richardson, Douglas, Isabel Despenser. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 8/10/2002. Subject: CP Addition: Isabel le Despenser's 1st marriage to Gilbert de Clare. Available at https://groups.google.com/g/soc.genealogy.medieval/c/rcWJLLlamEQ/m/Qmm0fRoUtdwJ. Author address: royalancestry at msn dot com. Information from this source tagged as [Ref: Douglas Richardson SGM 8/10/2002-232335].
  7. Schwennicke, Detlev, ed., Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten, New Series. III.1 (#1-#200): Herzogs und Grafenhauser des Heiligen Romischen Reiches Andere Europaische Furstenhauser. Marburg: Verlag von J. A. Stargardt, 1984. Information from this source tagged as [Ref: ES III.1 #[0-9]*].
  8. 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 v1[pc][0-9]*].
  9. 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]*].
  10. 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 v3p[0-9]*].

Sources for birth and parent Information
date:
1281 [Ref: Altschul CLARE #3, ES III.1 #156]
bp 3 Feb 1280/1 [Ref: CP III p246(b), Richardson RoyalAnc v1p218]
first son [Ref: CP V p700(h)],
place:
[Ref: CP III p246(b), Richardson RoyalAnc v1p218],
parents:
[Ref: Altschul CLARE #3, CP III p246(b), CP V p700(h), Richardson RoyalAnc v1p216]
Sources with Inaccurate birth and parent Information
name:
Thomas [Ref: CP V p700(h)]
Sources for baptism Information
date:
[Ref: CP III p246(b), Richardson RoyalAnc v1p218],
place:
[Ref: CP III p246(b), Richardson RoyalAnc v1p218]
Sources for death Information
date:
1307 before 16 Nov [Ref: CP III p246(b)]
1308 [Ref: Altschul CLARE #3, ES III.1 #156]
shortly before 17 Nov 1307 [Ref: Richardson RoyalAnc v1p218, Richardson RoyalAnc v3p255]
Sources with Information about marriage to Isabel DESPENSER
date:
first marriage of Isabel [Ref: CP++(proposed) Clare 12/31/2006 (CP III p246(b)), CP++(proposed) Hastings 12/31/2006 (CP VI p348), CP++(proposed) Monthermer 12/31/2006 (CP IX p142), Douglas Richardson SGM 8/10/2002-232335, Richardson RoyalAnc v1p218, Richardson RoyalAnc v2p197, Richardson RoyalAnc v2p443, Richardson RoyalAnc v3p255],
names:
[Ref: Altschul CLARE #3, CP III p246(b)]
Research Notes:
Lord of Thomond [Ref: Altschul CLARE #3, CP++ Gloucester 12/31/2006 (CP V p700(h))]

Knt, of Tarrant Rushton, Dorset [Ref: Richardson RoyalAnc v1p218]

heir of his father [Ref: CP++ Gloucester 12/31/2006 (CP V p700(h)), Richardson RoyalAnc v1p218]

d.s.p; heir was his brother Richard [Ref: CP++ Gloucester 12/31/2006 (CP V p700(h))]



Pedigree of Gilbert De CLARE, Lord Of Thomond
                                                                /-----Richard FITZ GILBERT De CLARE, Baron Of Clare
                                                       /-----Gilbert FITZ RICHARD, Baron Of Clare
                                                      |         \-----Rohese GIFFARD
                                              /-----Richard FITZ GILBERT De CLARE, Baron Of Clare
                                             |        |         /-----Hugh Count Of Clermont
                                             |         \-----Adeliza De CLERMONT
                                             |                  \-----Margaret De Roucy
                                     /-----Roger De CLARE, Earl Of Hertford
                                    |        |                  /-----Ranulph II De MESCHINES, Vicomte De Bayeux
                                    |        |         /-----Ranulph III De MESCHINES, Earl Of Chester
                                    |        |        |         \-----Margaret Le Goz
                                    |         \-----Adeliza Le MESCHIN
                                    |                 |         /-----Thorold Of Buckingham, Sheriff Of Lincoln
                                    |                  \-----Lucia Of East Angies
                                    |                           \-----(Unk Dau)
                            /-----Richard De CLARE, Earl Of Hertford, MC Surety
                           |        |                           /-----Eudo De St James
                           |        |                  /-----Hasculf De St JAMES, Baron Of Field Dalling
                           |        |         /-----James De St HILARY, Baron Of Field Dalling
                           |        |        |         \-----Matilda
                           |         \-----Maud St. HILLARY
                           |                  \-----Aveline
                   /-----Sir Gilbert De CLARE, Earl Of Hertford And Glouceste
                  |        |                                    /-----William The Conqueror King Of England
                  |        |                           /-----Henry I Beauclerc King Of England
                  |        |                          |         \-----Maud Of Flanders
                  |        |                  /-----Robert The Consul De CAEN, Earl Of Gloucester
                  |        |         /-----William Meullant FITZ ROBERT, Earl Of Gloucester
                  |        |        |        |                  /-----Hamon Sheriff Of Kent
                  |        |        |        |         /-----Robert FITZ HAMOND, Lord Of Tewkesbury
                  |        |        |         \-----Maud FITZ HAMOND
                  |        |        |                 |         /-----Roger De Montgomery, Earl Of Shrewsbury
                  |        |        |                  \-----Sybil De Montgomery
                  |        |        |                           \-----Mabel De Belesme
                  |         \-----Amice MEULANT, Countess Of Gloucester
                  |                 |                           /-----Roger De Beaumont
                  |                 |                  /-----Sir Robert De Beaumont, Earl Of Leicester
                  |                 |                 |         \-----Adelise Of Meulan
                  |                 |         /-----Sir Robert II De Beaumont, Earl Of Leicester
                  |                 |        |        |         /-----Hugh Magnus Duke Of France
                  |                 |        |         \-----Isabel De Vermandois, Countess Of Leicester
                  |                 |        |                  \-----Adelaide De Vermandois, Countess Of Vermandois
                  |                  \-----Hawise DeBEAUMONT
                  |                          |                  /-----Ralph De Gael De Montfort, Earl Of Norfolk
                  |                          |         /-----Ralph De MONTFORT, Seigneur Of Montfort-Gael
                  |                          |        |         \-----Emma Fitz Osbern
                  |                           \-----Amicia De Gael
          /-----Richard De CLARE, Earl Of Gloucester And Hertfor
         |        |                                    /-----Robert Marshal
         |        |                           /-----Gilbert GIFFARD, Marshal
         |        |                  /-----John Fitz GILBERT The Marshal
         |        |                 |        |         /-----Geoffrey De VENOIZ
         |        |                 |         \-----(Unk dau) De VENOIZ
         |        |         /-----Sir William MARSHALL, Protector, Earl Of Pembroke
         |        |        |        |                           /-----Girold DAPIFER
         |        |        |        |                  /-----Edward De SARESBERIE, Baron Of Trowbridge
         |        |        |        |                 |         \-----Wulfwynn Of Cresswell
         |        |        |        |         /-----Walter De SALISBURY, Baron Of Chitterne
         |        |        |         \-----Sibyl De SALISBURY
         |        |        |                 |                  /-----Hugh
         |        |        |                 |         /-----Patric De CHAWORTH, Baron Of Kempsford
         |        |        |                  \-----Sibyl De CHAWORTH
         |        |        |                          |         /-----Ernulph De HESDIN, Baron Of Keevil
         |        |        |                           \-----Matilda De HESDIN
         |        |        |                                    \-----Emmeline
         |         \-----Isabel MARSHALL
         |                 |                                    /-----Richard FITZ GILBERT De CLARE, Baron Of Clare
         |                 |                           /-----Gilbert FITZ RICHARD, Baron Of Clare
         |                 |                          |         \-----Rohese GIFFARD
         |                 |                  /-----Gilbert De CLARE, Earl Of Pembroke
         |                 |                 |        |         /-----Hugh Count Of Clermont
         |                 |                 |         \-----Adeliza De CLERMONT
         |                 |                 |                  \-----Margaret De Roucy
         |                 |         /-----Richard "Strongbow" De CLARE, Earl Of Pembroke
         |                 |        |        |                  /-----Roger De Beaumont
         |                 |        |        |         /-----Sir Robert De Beaumont, Earl Of Leicester
         |                 |        |        |        |         \-----Adelise Of Meulan
         |                 |        |         \-----Elizabeth De BEAUMONT
         |                 |        |                 |         /-----Hugh Magnus Duke Of France
         |                 |        |                  \-----Isabel De Vermandois, Countess Of Leicester
         |                 |        |                           \-----Adelaide De Vermandois, Countess Of Vermandois
         |                  \-----Isabel De CLARE, Countess Of Pembroke
         |                          |                           /-----Murchad Mac DAIRMAIT, King Of Laigin And Leinste
         |                          |                  /-----Donnchad Mac MURCHAD, King Of Dublin, Laigin, Lei
         |                          |                 |         \-----Sadb
         |                          |         /-----Dairmait Mac MURCHAD, King Of Leinster
         |                          |        |        |         /-----Gilla Michil Ua Braenain
         |                          |        |         \-----Orlaith
         |                          |        |                  \-----Iuchdelb
         |                           \-----Aoife Macmurchada Of Leinster
         |                                   |                  /-----Gillacomghall Ua TUATHAIL
         |                                   |         /-----Muirchertach Ua TUATHAIL, King Of Ui Muiredaig
         |                                    \-----Mor Ua TUATHAIL
         |                                            |         /-----Loigsech Ua MORDA, King Of Leix
         |                                             \-----Cacht Of Leix
         |                                                      \-----Gormflaith
 /-----Thomas DeCLARE, Lord Of Thomond
|        |                                                      /-----John FITZRICHARD
|        |                                             /-----Eustace Fitz John De BURGO, Constable Of Chester
|        |                                    /-----Richard FITZ EUSTACE, Constable Of Chester
|        |                                   |        |         /-----William FITZ NIGEL, Constable Of Chester
|        |                                   |         \-----Agnes De HALTON
|        |                                   |                  \-----Adeliz Of Widness
|        |                           /-----John Fitz Richard, Constable Of Chester
|        |                          |        |                  /-----Fulk De LISOURS
|        |                          |        |         /-----Robert LIZOURS
|        |                          |        |        |         \-----Aubrey
|        |                          |         \-----Albreada LIZOURS, Baroness Of Pontfract
|        |                          |                 |         /-----Robert De LACY, Baron Of Pontefract
|        |                          |                  \-----Aubrey De LACY
|        |                          |                           \-----Maud
|        |                  /-----Roger De LACY, Baron Of Pontefract
|        |                 |        |                           /-----(Unk) De CANTELOWE
|        |                 |        |                  /-----Richard
|        |                 |        |         /-----Roger FITZ RICHARD, Baron Of Warkworth
|        |                 |        |        |        |         /-----Roger BIGOD, Baron Of Framlingham
|        |                 |        |        |         \-----Jane BIGOD
|        |                 |        |        |                  \-----Alice De TOENI
|        |                 |         \-----Alice Fitz Roger
|        |                 |                 |                  /-----Alberic De VERE, Baron Of Hedingham
|        |                 |                 |         /-----Alberic II De VERE, Baron Of Hedingham
|        |                 |                 |        |         \-----Beatrix
|        |                 |                  \-----Alice De VERE
|        |                 |                          |         /-----Gilbert FITZ RICHARD, Baron Of Clare
|        |                 |                           \-----Adeliza De CLARE
|        |                 |                                    \-----Adeliza De CLERMONT
|        |         /-----John De LACY, Earl Of Lincoln, MC Surety
|        |        |        |                                    /-----Hugh I Vicount Of Chartres, Chatelain Of Puiset
|        |        |        |                           /-----Ebrard III Seigneur De Puiset
|        |        |        |                          |         \-----Alix Of Monthlery
|        |        |        |                  /-----Hugh III Seigneur De Puiset, Vicount Chartres
|        |        |        |                 |        |         /-----Bouchard II Count Of Corbeil
|        |        |        |                 |         \-----Adelaide Of Corbeil
|        |        |        |                 |                  \-----Adelaide De Crecy
|        |        |        |         /-----Ebrard IV Seigneur De Puiset, Vicount Chartres
|        |        |        |        |        |                  /-----Theobald III Count Of Blois And Champagne
|        |        |        |        |        |         /-----Stephen Count Of Blois, Leader Of First Crusade
|        |        |        |        |        |        |         \-----Garsend Of Maine
|        |        |        |        |         \-----Agnes
|        |        |        |        |                 |         /-----William The Conqueror King Of England
|        |        |        |        |                  \-----Adela
|        |        |        |        |                           \-----Maud Of Flanders
|        |        |         \-----Maud De CLERE
|        |        |                  \-----Heloise De ROUCY
|         \-----Maud De LACY
|                 |                                    /-----Saher De QUINCEY, Lord Of Buckby In Northampto
|                 |                           /-----Robert De QUINCEY
|                 |                          |        |         /-----Simon De St. LIZ, Earl Of Huntingdon
|                 |                          |         \-----Maud De ST LIZ
|                 |                          |                  \-----Maud Of Huntingdon
|                 |                  /-----Saire De QUINCEY, Earl Of Winchester, MC Suret
|                 |                 |        |                  /-----William Lord Of Leuchars
|                 |                 |        |         /-----Ness Of Leuchars
|                 |                 |         \-----Orabella
|                 |         /-----Robert De QUINCEY
|                 |        |        |                           /-----Sir Robert De Beaumont, Earl Of Leicester
|                 |        |        |                  /-----Sir Robert II De Beaumont, Earl Of Leicester
|                 |        |        |                 |         \-----Isabel De Vermandois, Countess Of Leicester
|                 |        |        |         /-----Sir Robert De BEAUMONT, Earl Of Leicester
|                 |        |        |        |        |         /-----Ralph De MONTFORT, Seigneur Of Montfort-Gael
|                 |        |        |        |         \-----Amicia De Gael
|                 |        |         \-----Margaret BEAUMONT
|                 |        |                 |                  /-----Robert De GRANTMESNIL
|                 |        |                 |         /-----William De GRANTMESNIL
|                 |        |                 |        |         \-----Emma De Estouteville
|                 |        |                  \-----Petronilla De GRANTMESNIL
|                  \-----Margaret De QUINCY, Heiress Of Lincoln
|                          |                                    /-----Ranulph II De MESCHINES, Vicomte De Bayeux
|                          |                           /-----Ranulph III De MESCHINES, Earl Of Chester
|                          |                          |         \-----Margaret Le Goz
|                          |                  /-----Ranulf De GERNON, Earl Of Chester, Vicomte D'Avranches
|                          |                 |        |         /-----Thorold Of Buckingham, Sheriff Of Lincoln
|                          |                 |         \-----Lucia Of East Angies
|                          |                 |                  \-----(Unk Dau)
|                          |         /-----Hugh Of Kevelioc, Earl Of Chester
|                          |        |        |                  /-----Henry I Beauclerc King Of England
|                          |        |        |         /-----Robert The Consul De CAEN, Earl Of Gloucester
|                          |        |         \-----Maud De CAEN
|                          |        |                 |         /-----Robert FITZ HAMOND, Lord Of Tewkesbury
|                          |        |                  \-----Maud FITZ HAMOND
|                          |        |                           \-----Sybil De Montgomery
|                           \-----Hawise Of Chester, Countess Of Lincoln
|                                   |                           /-----Simon I De MONTFORT, Seigneur Of Montfort L'Amau
|                                   |                  /-----Amauri IV De MONTFORT, Count Of Evereux
|                                   |                 |         \-----Agnes Of Evereux
|                                   |         /-----Simon De MONTFORT, Count Of Evreux
|                                   |        |        |         /-----Anscau De Garlande, Seneschal Of France
|                                   |        |         \-----Agnes De Garlande
|                                   |        |                  \-----(Unk) De Montmorency
|                                    \-----Bertrade De MONTFORT
|                                             \-----Maud
Gilbert De CLARE, Lord Of Thomond
|                                                               /-----Otho GERALDINO, Baron Of Windsor
|                                                      /-----Walter FITZ OTHO, Baron Of Eton
|                                             /-----Gerald Of Windsor, Constable Of Pembroke Castl
|                                            |         \-----Beatrice
|                                    /-----Maurice FITZ GERALD, Lord Of Lanstephen
|                                   |        |         /-----Rhys Ap Tudor Mawr Prince Of South Wales
|                                   |         \-----Nest Of Wales, Princess Of Deheubarth
|                                   |                 |         /-----Rhiwallon Ap Cynfn Of Powys
|                                   |                  \-----Gladys Of Powys
|                           /-----Gerald FITZ MAURICE, Baron Of Offaly
|                          |        |                           /-----Roger De Montgomery, Seigneur Of Montgomery
|                          |        |                  /-----Roger De Montgomery, Earl Of Shrewsbury
|                          |        |                 |         \-----Emma
|                          |        |         /-----Arnulph De MONTGOMERY
|                          |        |        |        |         /-----William II TALVAS
|                          |        |        |         \-----Mabel De Belesme
|                          |        |        |                  \-----Hildeburg
|                          |         \-----Alice De MONTGOMERY
|                          |                 |                  /-----Tairrdelbach Mac TADG, King Of Cashel And Munster, Hi
|                          |                 |         /-----Muirchertach Ua BRIAIN, High King Of Ireland
|                          |                 |        |         \-----Derbforgaill
|                          |                  \-----Lafrocoth
|                  /-----Sir Maurice FITZ GERALD, Baron Offaly
|                 |        |         /-----Robert De BIRMINGHAM
|                 |         \-----Eve De BERMINGHAM
|         /-----Maurice FITZ MAURICE FITZ GERALD, Lord Of Offaly
|        |         \-----Juliane
 \-----Julian FITZ MAURICE
         |                           /-----Maurice Lord of Prendergast
         |                  /-----Philip De PRENDERGAST
         |         /-----Gerald De PRENDERGAST
         |        |        |         /-----Robert De QUENCI, Constable of Leinster
         |        |         \-----Maude De QUENCI
         |        |                 |                           /-----Gilbert FITZ RICHARD, Baron Of Clare
         |        |                 |                  /-----Gilbert De CLARE, Earl Of Pembroke
         |        |                 |                 |         \-----Adeliza De CLERMONT
         |        |                 |         /-----Richard "Strongbow" De CLARE, Earl Of Pembroke
         |        |                 |        |        |         /-----Sir Robert De Beaumont, Earl Of Leicester
         |        |                 |        |         \-----Elizabeth De BEAUMONT
         |        |                 |        |                  \-----Isabel De Vermandois, Countess Of Leicester
         |        |                  \-----(Unk dau) De CLARE
          \-----Matilda De PRENDERGAST
                  |                           /-----Walter De BURGH
                  |                  /-----William De BURGH, Lord of Connaught
                  |                 |         \-----Alice
                  |         /-----Richard De BURGH, Lord of Connaught
                  |        |        |                           /-----Diarmaid O'Brien, King Of Munster
                  |        |        |                  /-----Tairrdelbach O'Brien, King Of Munster
                  |        |        |                 |         \-----Mor
                  |        |        |         /-----Domnall Mor O'Brien, King Of Munster
                  |        |        |        |        |         /-----Donnchad Balc Mac Gilla Patraic Ruad, King of Ossraig
                  |        |        |        |         \-----Sadb
                  |        |         \-----(Unk Dau) O'BRIEN
                   \-----Matilda De BURG
                           |                           /-----Gilbert De LACY
                           |                          |         \-----Emma De LACY
                           |                  /-----Hugh De LACY, Baron Of Weobley
                           |         /-----Walter De LACY, Baron Of Weobley
                           |        |        |                  /-----William Fitz BADERON, Baron Of Monmouth
                           |        |        |         /-----Baderon De MONMOUTH
                           |        |        |        |         \-----Hawise
                           |        |         \-----Roheis De MONMOUTH
                           |        |                 |         /-----Gilbert FITZ RICHARD, Baron Of Clare
                           |        |                  \-----Rohese De CLARE
                           |        |                           \-----Adeliza De CLERMONT
                            \-----Egidia (Jill) De LACY
                                    |                           /-----Philip De BRAOS, Baron Of Bramber
                                    |                  /-----William De BRAOS, Baron Of Bramber
                                    |                 |         \-----Aenor De TOTENEIS
                                    |         /-----William De BRAOS, Baron Of Bramber
                                    |        |        |         /-----Miles FITZ WALTER, Earl Of Hereford
                                    |        |         \-----Bertha Of Hereford
                                    |        |                  \-----Sibyl De NEUFMARCHE
                                     \-----Margaret De BRAOISE
                                             |                  /-----Reginald De St VALERY, Baron Of Beckley
                                             |         /-----Bernard De St VALERY, Baron Of Beckley
                                              \-----Matilda De ST VALERIE De HAIA
                                                       \-----Matilda



Descendants of Gilbert De CLARE, Lord Of Thomond
1. Gilbert De CLARE, Lord Of Thomond m. Isabel DESPENSER
m. Isabel DESPENSER father: Sir Hugh Le DESPENSER, Earl Of Winchester mother: Isabel De BEAUCHAMP