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Family:
Marriage:
Bibliography
  1. Barrett, Jonathan Tyers, Memorials of the parochial church, the collegiate chantry, and the chapel of St. Mary: commonly called Mortimer's Chapel, in the Parish of Attleborough, in the county of Norfolk, together with some account of the services used at the consecration of churches from the Anglo-Saxon to the present time, London: John W Parker, 1848. Available at https://archive.org/details/memorialsofparoc00barr. Also available at https://books.google.com/books?id=s0IIAAAAQAAJ. Information from this source tagged as [Ref: Barrett Attleborough 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 10, Oakham-Richmond. London: St Catherine Press, 1945. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP X [Ap][p0-9].*].
  4. 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].*].
  5. Farnham, George F, Leicestershire Medieval Pedigrees. Leicester: Thornley, 1925. Available at https://familysearch.org/search/film/007941560 images 458-633. Information from this source tagged as [Ref: Farnham Pedigrees 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 v4p[0-9]*].

Sources for birth and parent Information
date:
[Ref: CP X p174, Richardson RoyalAnc v4p498]
age 2 at death of mother [Ref: CP X p463(k)],
place:
[Ref: CP X p174, Richardson RoyalAnc v4p498],
parents:
[Ref: Barrett Attleborough p181, Burke Peerage p1510, CP X p174, CP X p463(k), CP XI p102, Farnham Pedigrees p18f, Richardson RoyalAnc v4p351, Richardson RoyalAnc v4p498],
father:
[Ref: Burke Peerage p583]
Sources for death Information
date:
[Ref: CP X p174, CP XI p102, Richardson RoyalAnc v4p498]
1394 [Ref: Burke Peerage p583]
1395 [Ref: Burke Peerage p1510]
will pro 29 Aug 1394 [Ref: Farnham Pedigrees p18f],
place:
[Ref: CP XI p102, Richardson RoyalAnc v4p498]
Sources for burial Information
place:
[Ref: Richardson RoyalAnc v4p498]
Sources with Information about marriage to Sir John De ROS, Lord Ros Of Helmsley
date:
before 22 Jun 1382 [Ref: CP XI p102, Richardson RoyalAnc v4p498]
in or before 1382 [Ref: CP X p174],
names:
[Ref: Barrett Attleborough p181, Burke Peerage p1510, Burke Peerage p583, CP X p463(k), Farnham Pedigrees p18f, Richardson RoyalAnc v4p353]
Research Notes:
4th Baroness Orreby, of Barony cr 1309 [Ref: CP X p174]

heir of her mother [Ref: CP X p174]

de jure (according to modern doctrine) Baroness Orreby and Barroness Mare [Ref: CP XI p102 (with corr in XIV p553)]

on her death s.p., Baronies of Orreby and Mare became extinct [Ref: CP XI p102 (with corr in XIV p553)]



Pedigree of Mary De PERCY, Baroness Orreby
                                                                /-----Godfrey I The Bearded Duke Of Brabant
                                                       /-----Jocelin LOUVAIN, Lord Of Petworth
                                              /-----Sir Henry De PERCY
                                             |        |         /-----William De PERCY, Baron Of Topcliffe
                                             |         \-----Agnes De PERCY
                                             |                  \-----Adeliza De TUNBRIDGE
                                     /-----Sir William De PERCY, Baron Of Topcliffe
                                    |        |                  /-----Adam De BRUS, Baron Of Skelton
                                    |        |         /-----Adam II De BRUS, Baron Of Skelton
                                    |        |        |         \-----Agnes Of Aumale
                                    |         \-----Isabel De BRUS
                                    |                 |         /-----William De ARCHES
                                    |                  \-----Juetta De ARCHES
                                    |                           \-----Jueta
                            /-----Sir Henry De PERCY, Baron Of Topcliffe
                           |        |                           /-----Hugh De BALLIOL
                           |        |                  /-----Joscelin De BALLIOL
                           |        |         /-----Ingram De BALIOL
                           |         \-----Ellen BALIOL
                           |                 |         /-----Walter De BERKELEY
                           |                  \-----(Unk Dau) De BERKELEY
                   /-----Sir Henry PERCY, Lord Percy
                  |        |                                    /-----Geoffrey Plantagenet Count Of Anjou, Duke Of Normandy
                  |        |                           /-----Hameline PLANTAGENET, Earl Of Surrey
                  |        |                  /-----William De WARENNE, Earl Of Surrey
                  |        |                 |        |         /-----William III De WARRENNE, Earl Of Surrey
                  |        |                 |         \-----Isabel De WARENNE, Countess Of Surrey
                  |        |                 |                  \-----Ela TALVAS
                  |        |         /-----John De WARENNE, Earl Of Surrey
                  |        |        |        |                  /-----John Fitz GILBERT The Marshal
                  |        |        |        |         /-----Sir William MARSHALL, Protector, Earl Of Pembroke
                  |        |        |        |        |         \-----Sibyl De SALISBURY
                  |        |        |         \-----Maud MARSHALL
                  |        |        |                 |         /-----Richard "Strongbow" De CLARE, Earl Of Pembroke
                  |        |        |                  \-----Isabel De CLARE, Countess Of Pembroke
                  |        |        |                           \-----Aoife Macmurchada Of Leinster
                  |         \-----Eleanor De WARENNE
                  |                 |                           /-----Hugh Sire De Lusignan
                  |                 |                  /-----Hugh IX De Lusignan, Sire De Lusignan
                  |                 |                 |         \-----Orengarde
                  |                 |         /-----Hugh X De Lusignan, Count Of La Marche
                  |                 |        |        |         /-----Pierre II Sire De Preuilly
                  |                 |        |         \-----Agatha De Preuilly
                  |                 |        |                  \-----Aenor De Mauleon
                  |                  \-----Alfais De LUSIGNAN
                  |                          |                  /-----William Guillaume IV Tailefer, Count Of Angouleme
                  |                          |         /-----Aymer Tailefer, Count Of Angouleme
                  |                          |        |         \-----Marguerite De Turenne
                  |                           \-----Isabel Of Angouleme
                  |                                   |         /-----Peter Of France, Lord Of Courteney
                  |                                    \-----Alice De Courtenay
                  |                                             \-----Elizabeth De Courtenay
          /-----Henry De PERCY, Lord Percy
         |        |                                             /-----William FITZALAN, Baron Of Oswestry
         |        |                                    /-----John FITZALAN, Baron Of Oswestry
         |        |                                   |         \-----(Unk Dau) De LACY
         |        |                           /-----Sir John FITZALAN, Earl Of Arundel
         |        |                          |        |         /-----William D'AUBIGNY, Earl Of Arundel
         |        |                          |         \-----Isabel D'AUBIGNY
         |        |                          |                  \-----Mabel Of Chester
         |        |                  /-----Sir John FITZALAN, Earl Of Arundel
         |        |                 |        |                  /-----Theobald WALTER
         |        |                 |        |         /-----Theobald Le BOTELER
         |        |                 |        |        |         \-----Maud VAVASOUR
         |        |                 |         \-----Maud De VERDUN
         |        |                 |                 |         /-----Nicholas De VERDUN
         |        |                 |                  \-----Rohese De VERDUN
         |        |                 |                           \-----Clemence
         |        |         /-----Sir Richard FITZ ALAN, Earl Of Arundel
         |        |        |        |                           /-----Roger De MORTIMER, Baron Of Wigmore
         |        |        |        |                  /-----Ralph MORTIMER, Baron Of Wigmore
         |        |        |        |                 |         \-----Isabel De FERRIERS
         |        |        |        |         /-----Sir Roger MORTIMER, Baron Of Wigmore
         |        |        |        |        |        |         /-----Llewellyn Fawr The Great AP IORWORTH, Prince Of North Wales
         |        |        |        |        |         \-----Gladys DHU
         |        |        |        |        |                  \-----Tangwystl Of Rhos
         |        |        |         \-----Isabel MORTIMER
         |        |        |                 |                  /-----Reginald De BRAOS, Baron Of Bramber
         |        |        |                 |         /-----William De BRAIOSE, Baron Of Brecknock Castle
         |        |        |                 |        |         \-----Gracia De BRIWERE
         |        |        |                  \-----Maud De BRAOISE
         |        |        |                          |         /-----Sir William MARSHALL, Protector, Earl Of Pembroke
         |        |        |                           \-----Eve MARSHALL
         |        |        |                                    \-----Isabel De CLARE, Countess Of Pembroke
         |         \-----Eleanor FITZ ALAN
         |                 |                                    /-----Manfred II Margrave Of Saluzzo
         |                 |                           /-----Bonifacio Of Vasto
         |                 |                          |         \-----Adilasia Of Monferrat
         |                 |                  /-----Manfred III Margrave Of Saluzzo
         |                 |                 |        |         /-----Comita II Judicarius Of Torres
         |                 |                 |         \-----Maria Of Torres
         |                 |                 |                  \-----Ispella Of Arborea
         |                 |         /-----Thomas I Margrave Of Saluzzo
         |                 |        |        |                  /-----Thomas I Count Of Savoy
         |                 |        |        |         /-----Amadeus IV Count Of Savoy, Marquess Of Turin
         |                 |        |        |        |         \-----Margaret Of Geneva
         |                 |        |         \-----Beatrice Of Savoy
         |                 |        |                 |         /-----Hugh III Duke Of Burgundy
         |                 |        |                  \-----Anna Of Burgundy
         |                 |        |                           \-----Beatrix Of Albon
         |                  \-----Alasia Of Saluzzo
         |                          |                           /-----Guglielmo I Marquis Of Ceva
         |                          |                  /-----Guglielmo II Marquis Of Ceva
         |                          |         /-----George Of Ceva, Marquis Of Ceva
         |                          |        |        |         /-----Manfred II Margrave Of Saluzzo
         |                          |        |         \-----(Unk) De Vasto
         |                          |        |                  \-----Adilasia Of Monferrat
         |                           \-----Luisa Of Ceva
         |                                    \-----Menzia De ESTE
 /-----Henry De PERCY, Lord Percy
|        |                                                      /-----Walter De CLIFFORD, Baron Of Clifford
|        |                                             /-----Walter CLIFFORD, Baron Of Clifford
|        |                                            |         \-----Margaret De TOENI
|        |                                    /-----Roger CLIFFORD
|        |                                   |        |         /-----Roger De CONDET
|        |                                   |         \-----Agnes De CONDET
|        |                           /-----Roger CLIFFORD
|        |                          |        |                  /-----Robert De EWYES, Baron Of Ewyas Harold
|        |                          |        |         /-----Robert De EWYES, Baron Of Ewyas Harold
|        |                          |        |        |         \-----Sibil
|        |                          |         \-----Sibilla De EWYAS
|        |                          |                  \-----Petronilla
|        |                  /-----Roger De CLIFFORD
|        |                 |         \-----Maud
|        |         /-----Robert De CLIFFORD, Lord Clifford
|        |        |        |                                    /-----William De VIPONT
|        |        |        |                           /-----Robert De VIPONT, Baron Of Appleby
|        |        |        |                          |         \-----Matilda De MORVILLE
|        |        |        |                  /-----John De VIPONT, Baron Of Appleby
|        |        |        |                 |        |         /-----John De BUISLY
|        |        |        |                 |         \-----Idonea De BUISLY
|        |        |        |                 |                  \-----Cicely De BUSLI
|        |        |        |         /-----Robert De VESPONT
|        |        |        |        |        |                  /-----William FERRERS, Earl Of Derby
|        |        |        |        |        |         /-----William De FERRERS, Earl Of Derby
|        |        |        |        |        |        |         \-----Sibyl De BRAOISE
|        |        |        |        |         \-----Sibilla De FERRERS
|        |        |        |        |                 |         /-----Hugh Of Kevelioc, Earl Of Chester
|        |        |        |        |                  \-----Agnes Of Chester, Lady Of Chartley
|        |        |        |        |                           \-----Bertrade De MONTFORT
|        |        |         \-----Isabel De VESPONT
|        |        |                 |                           /-----Piers De LUTEGARESHALE
|        |        |                 |                  /-----Geoffrey FITZ PIERS, Earl Of Essex
|        |        |                 |                 |         \-----Maud
|        |        |                 |         /-----Sir John FITZ GEOFFREY
|        |        |                 |        |        |         /-----Roger De CLARE, Earl Of Hertford
|        |        |                 |        |         \-----Aveline De CLARE
|        |        |                 |        |                  \-----Maud St. HILLARY
|        |        |                  \-----Isabel FITZ JOHN
|        |        |                          |                  /-----Roger BIGOD, Earl Of Norfolk, MC Surety
|        |        |                          |         /-----Hugh BIGOD, Earl Of Norfolk, MC Surety
|        |        |                          |        |         \-----Ida Countess Of Norfolk
|        |        |                           \-----Isabel BIGOD
|        |        |                                   |         /-----Sir William MARSHALL, Protector, Earl Of Pembroke
|        |        |                                    \-----Maud MARSHALL
|        |        |                                             \-----Isabel De CLARE, Countess Of Pembroke
|         \-----Idonia De CLIFFORD
|                 |                                             /-----Roger De CLARE, Earl Of Hertford
|                 |                                    /-----Richard De CLARE, Earl Of Hertford, MC Surety
|                 |                                   |         \-----Maud St. HILLARY
|                 |                           /-----Sir Gilbert De CLARE, Earl Of Hertford And Glouceste
|                 |                          |        |         /-----William Meullant FITZ ROBERT, Earl Of Gloucester
|                 |                          |         \-----Amice MEULANT, Countess Of Gloucester
|                 |                          |                  \-----Hawise DeBEAUMONT
|                 |                  /-----Richard De CLARE, Earl Of Gloucester And Hertfor
|                 |                 |        |                  /-----John Fitz GILBERT The Marshal
|                 |                 |        |         /-----Sir William MARSHALL, Protector, Earl Of Pembroke
|                 |                 |        |        |         \-----Sibyl De SALISBURY
|                 |                 |         \-----Isabel MARSHALL
|                 |                 |                 |         /-----Richard "Strongbow" De CLARE, Earl Of Pembroke
|                 |                 |                  \-----Isabel De CLARE, Countess Of Pembroke
|                 |                 |                           \-----Aoife Macmurchada Of Leinster
|                 |         /-----Thomas DeCLARE, Lord Of Thomond
|                 |        |        |                           /-----John Fitz Richard, Constable Of Chester
|                 |        |        |                  /-----Roger De LACY, Baron Of Pontefract
|                 |        |        |                 |         \-----Alice Fitz Roger
|                 |        |        |         /-----John De LACY, Earl Of Lincoln, MC Surety
|                 |        |        |        |        |         /-----Ebrard IV Seigneur De Puiset, Vicount Chartres
|                 |        |        |        |         \-----Maud De CLERE
|                 |        |        |        |                  \-----Heloise De ROUCY
|                 |        |         \-----Maud De LACY
|                 |        |                 |                  /-----Saire De QUINCEY, Earl Of Winchester, MC Suret
|                 |        |                 |         /-----Robert De QUINCEY
|                 |        |                 |        |         \-----Margaret BEAUMONT
|                 |        |                  \-----Margaret De QUINCY, Heiress Of Lincoln
|                 |        |                          |         /-----Hugh Of Kevelioc, Earl Of Chester
|                 |        |                           \-----Hawise Of Chester, Countess Of Lincoln
|                 |        |                                    \-----Bertrade De MONTFORT
|                  \-----Maud De CLARE
|                          |                                    /-----Maurice FITZ GERALD, Lord Of Lanstephen
|                          |                           /-----Gerald FITZ MAURICE, Baron Of Offaly
|                          |                          |         \-----Alice De MONTGOMERY
|                          |                  /-----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
|                                   |        |                  \-----(Unk dau) De CLARE
|                                    \-----Matilda De PRENDERGAST
|                                            |                  /-----William De BURGH, Lord of Connaught
|                                            |         /-----Richard De BURGH, Lord of Connaught
|                                            |        |         \-----(Unk Dau) O'BRIEN
|                                             \-----Matilda De BURG
|                                                     |         /-----Walter De LACY, Baron Of Weobley
|                                                      \-----Egidia (Jill) De LACY
|                                                               \-----Margaret De BRAOISE
Mary De PERCY, Baroness Orreby
|                                                               /-----Herbert De ORREBY
|                                                      /-----Sir Philip De ORREBY, Justiciar Of Chester
|                                                     |         \-----Agnes De KYME
|                                             /-----Fulk De ORREBY
|                                            |        |         /-----Thomas De BAUMVILLE
|                                            |         \-----Alice De BAUMVILLE
|                                            |                  \-----Agnes De STORETON
|                                    /-----Fulk De ORREBY
|                                   |        |         /-----John STRANGE
|                                   |         \-----Philippe STRANGE
|                           /-----John De ORREBY, Lord Orreby
|                  /-----Philip De ORREBY
|                 |        |                                    /-----Robert De TATESHALE, Baron Of Tattershall
|                 |        |                           /-----Walter De TATESHALE
|                 |        |                          |         \-----Isabel De WELLS
|                 |        |                  /-----Robert De TATESHALE, Baron Of Tattershall
|                 |        |                 |        |         /-----William PANTULF
|                 |        |                 |         \-----Iseult PANTULF
|                 |        |                 |                  \-----Joan De GOLDINGTON
|                 |        |         /-----Robert De TATESHALE, Baron Of Tattershall
|                 |        |        |        |                  /-----William D'AUBIGNY, Earl Of Sussex And Arundel
|                 |        |        |        |         /-----William D'AUBIGNY, Earl Of Arundel
|                 |        |        |        |        |         \-----Maud St. HILLARY
|                 |        |        |         \-----Maud D'AUBIGNY
|                 |        |        |                 |         /-----Hugh Of Kevelioc, Earl Of Chester
|                 |        |        |                  \-----Mabel Of Chester
|                 |        |        |                           \-----Bertrade De MONTFORT
|                 |         \-----Isabel TATESHAL
|                 |                 |                  /-----Henry De GREY
|                 |                 |                 |         \-----Hawise De GRAY
|                 |                 |         /-----Sir John De GREY
|                 |                 |        |         \-----Iseude De BARDOLF
|                 |                 |        |                  \-----(Unk Dau) BARDOLF
|                 |                  \-----Nichole De GREY
|                 |                          |                  /-----Roger De CAUZ
|                 |                          |         /-----Roger De CAUZ
|                 |                           \-----Emma De CAUZ
|                 |                                   |         /-----Bartholomew De LEIGH
|                 |                                    \-----Nichole De LEIGH
|                 |                                             \-----Emma RUFFUS
|         /-----John De ORREBY, Lord Orreby
|        |        |                                    /-----Sir William De La MARE
|        |        |                           /-----Henry De La MARE
|        |        |                          |         \-----Basile
|        |        |                  /-----Matthew De La MARE
|        |        |                 |        |                  /-----Hugh De NEVILLE
|        |        |                 |        |         /-----Sir John De NEVILLE
|        |        |                 |        |        |         \-----Joan De CORNHILL
|        |        |                 |         \-----Joan De NEVILLE
|        |        |                 |                 |         /-----Sir Robert De COURTENAY, Baron Of Oakhampton
|        |        |                 |                  \-----Hawise De COURTENAY
|        |        |                 |                           \-----Mary De VERNON
|        |        |         /-----John De La MARE, Lord Mare
|        |        |        |        |                  /-----Ralph De AKENI
|        |        |        |        |         /-----Roger De AKENI
|        |        |        |         \-----Florence De AKENI
|        |        |        |                  \-----Joan De AUBIGNY
|        |         \-----Florence De La MARE, Baroness Mare
|        |                 |                                    /-----Walter De DUNSTANVILLE, Baron Of Castle Combe
|        |                 |                           /-----Walter De DUNSTANVILLE, Baron Of Castle Combe
|        |                 |                          |         \-----Sibil
|        |                 |                  /-----Walter De DUNSTANVILLE, Baron Of Castle Combe
|        |                 |                 |        |         /-----William FERRERS, Earl Of Derby
|        |                 |                 |         \-----Sibyl De FERRERS
|        |                 |                 |                  \-----Sibyl De BRAOISE
|        |                 |         /-----Walter De DUNSTANVILLE, Baron Of Castle Combe
|        |                  \-----Pernel De DUNSTANVILLE
 \-----Joan De ORREBY, Baroness Orreby
          \-----Margaret



Descendants of Mary De PERCY, Baroness Orreby
1. Mary De PERCY, Baroness Orreby m. Sir John De ROS, Lord Ros Of Helmsley
m. Sir John De ROS, Lord Ros Of Helmsley father: Thomas De ROS, Lord Ros Of Helmsley mother: Beatrice STAFFORD