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Family:
Bibliography
  1. 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].*].
  2. Ravilious, John, Fitzwilliam. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 6/15/2006. Subject: Pennington and Lacy. Available at https://groups.google.com/g/soc.genealogy.medieval/c/zIW_3qE5QpA/m/5x5eVMVaoJAJ. Author address: Therav3 at aol dot com. Information from this source tagged as [Ref: John Ravilious SGM 6/15/2006-221024].
  3. 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]*].

Sources for birth and parent Information
parents:
[Ref: CP V p518note, John Ravilious SGM 6/15/2006-221024, Richardson RoyalAnc v2p676]
Research Notes:



Pedigree of Robert FITZWILLIAM
                                                                /-----William FITZ WILLIAM
                                                       /-----Sir Thomas FITZ WILLIAM, Lord Of Emley And Sprotbro
                                                      |         \-----Adela/Ela De WARENNE
                                              /-----Sir William FITZ THOMAS
                                             |        |         /-----Roger II BERTRAM, Baron Of Mitford
                                             |         \-----Agnes BERTRAM
                                             |                  \-----Agnes
                                     /-----Sir William FITZWILLIAM, Lord Of Emley And Sprotbrou
                                    |        |                  /-----Henry De GREY
                                    |        |         /-----Sir Richard De GREY
                                    |        |        |         \-----Iseude De BARDOLF
                                    |         \-----Agnes GREY
                                    |                 |         /-----John De HUMEZ
                                    |                  \-----Lucy De HUMEZ
                            /-----Sir John FITZWILLIAM
                           |        |                           /-----Oliver DEINCOURT, Baron Of Blankney
                           |        |                  /-----Sir John DEINCOURT, Baron Of Blankney
                           |        |                 |         \-----Nichola De La HAY, Lady Of Munden
                           |        |         /-----Sir Edmund DEINCOURT, Lord Deincourt
                           |        |        |        |         /-----Geoffrey FITZ ROBERT De NEVILL
                           |        |        |         \-----Agnes De NEVILLE
                           |        |        |                  \-----Joan
                           |         \-----Isabel DEINCOURT
                           |                 |                  /-----Sir Reynold De MOHUN, Baron Of Dunster
                           |                 |         /-----Sir Reynold De MOHUN, Baron Of Dunster
                           |                 |        |         \-----Alice De BRIWERE
                           |                  \-----Isabel De MOHUN
                           |                          |         /-----Geoffrey FITZ PIERS, Earl Of Essex
                           |                           \-----Hawise FITZ GEOFFREY
                           |                                    \-----Aveline De CLARE
                   /-----Sir John FITZ WILLIAM
                  |        |                                    /-----Alexander Of Reresby
                  |        |                           /-----Isoreus De RERESBY
                  |        |                          |         \-----Juliana
                  |        |                  /-----Ralph RERESBY, Lord Of Eshoner
                  |        |                 |        |         /-----John De AINCOURT
                  |        |                 |         \-----Amicia De AINCOURT
                  |        |                 |                  \-----Amabillia De PLESLEY
                  |        |         /-----Sir Adam RERESBY, Lord Of Thriberg
                  |        |        |        |         /-----Ralph De NORMANVILLE, Lord Of Thriberg
                  |        |        |         \-----Margery De NORMANVILLE
                  |         \-----Joan RERESBY
                  |                  \-----Thethegna
          /-----Sir William FITZWILLIAM, Lord Of Emley
         |        |                                             /-----Osbert De CLINTON
         |        |                                    /-----Thomas De CLINTON
         |        |                                   |         \-----Elisant
         |        |                           /-----Thomas De CLINTON
         |        |                          |        |         /-----James De BISEY
         |        |                          |         \-----Mazera De BISEY
         |        |                  /-----John De CLINTON, Lord Clinton
         |        |                 |        |         /-----Sir Ralph BRACEBRIDGE
         |        |                 |         \-----Maud BRACEBRIDGE
         |        |         /-----Sir William CLINTON, Earl Of Huntingdon
         |        |        |        |                           /-----Hugh De ODINGSELLES
         |        |        |        |                  /-----William De ODINGSELLS
         |        |        |        |                 |         \-----Basilia De LIMESY
         |        |        |        |         /-----William ODDINGSELLS, Lord Of Maxtock
         |        |        |        |        |         \-----Joan
         |        |        |         \-----Ida ODDINGSELLS
         |        |        |                 |                  /-----Robert FITZ WALTER, Leader Of MC Barons
         |        |        |                 |         /-----Sir Walter FITZ ROBERT, Baron Of Little Dunmow
         |        |        |                 |        |         \-----Rohese
         |        |        |                  \-----Ela FITZ WALTER
         |        |        |                          |         /-----William LONGESPEE, Earl of Salisbury
         |        |        |                           \-----Ida LONGSPEE
         |        |        |                                    \-----Ela Of Salisbury
         |         \-----Elizabeth CLINTON
 /-----Sir John FITZWILLIAM, Lord Of Emley
|        |                                                      /-----Ralph De CROMWELL
|        |                                             /-----Sir Ralph De CROMWELL
|        |                                    /-----Ralph De CROMWELL
|        |                                   |        |         /-----Sir Roger De SOMERY, Baron Of Dudley
|        |                                   |         \-----Margaret De SOMERY
|        |                                   |                  \-----Nichole D'AUBIGNY
|        |                           /-----Sir Ralph De CROMWELL
|        |                          |        |                  /-----Sir John De SOMERVILLE
|        |                          |        |         /-----Robert De SOMERVILLE
|        |                          |         \-----Joan De SOMERVILLE
|        |                          |                 |         /-----Roger De MERLAY, Baron Of Morpeth
|        |                          |                  \-----Isabel De MERLAY
|        |                          |                           \-----Isabel De ROS
|        |                  /-----Sir Ralph De CROMWELL
|        |                 |        |                           /-----Geoffrey De La MARE
|        |                 |        |                  /-----Peter De La MARE
|        |                 |        |         /-----Geoffrey De La MARE
|        |                 |         \-----Joan De La MARE
|        |                 |                  \-----(Unk wife1)
|        |         /-----Sir Ralph CROMWELL, Lord Cromwell
|        |        |        |                                    /-----Ralph BELER
|        |        |        |                           /-----Roger BELER
|        |        |        |                          |         \-----Emma FOLVILLE
|        |        |        |                  /-----William BELER
|        |        |        |                 |         \-----Alice
|        |        |        |         /-----Sir Roger De BELLERS
|        |        |        |        |         \-----Amice
|        |        |         \-----Amice De BELLERS
|        |        |                  \-----Alice WAKEBRUGGE
|         \-----Maude De CROMWELL
|                 |                           /-----Sir Hugh BERNAKE
|                 |                  /-----Sir William BERNAKE
|                 |                 |        |                  /-----Thomas De WOORTHORPE
|                 |                 |        |         /-----Sir William WOODTHORPE
|                 |                 |         \-----Maud WOODTHORPE
|                 |         /-----Sir John BERNACKE
|                 |        |        |                           /-----Robert De DRIBY
|                 |        |        |                  /-----Sir Simon DRIBY
|                 |        |        |         /-----Robert DRIBY
|                 |        |        |        |        |         /-----Hugh FITZ RALPH
|                 |        |        |        |         \-----Alice GREASLEY
|                 |        |        |        |                  \-----Agnes De GREASLEY
|                 |        |         \-----Alice DRIBY
|                 |        |                 |                  /-----Robert De TATESHALE, Baron Of Tattershall
|                 |        |                 |         /-----Robert De TATESHALE, Baron Of Tattershall
|                 |        |                 |        |         \-----Maud D'AUBIGNY
|                 |        |                  \-----Joan De TATESHALE
|                 |        |                          |         /-----Sir John De GREY
|                 |        |                           \-----Nichole De GREY
|                 |        |                                    \-----Emma De CAUZ
|                  \-----Maud BERNAKE
|                          |                                    /-----Robert The Younger De MARION
|                          |                           /-----Sir William MARMION
|                          |                          |         \-----Avice De TANFIELD
|                          |                  /-----Sir John De MARMION, Lord Marmion
|                          |                 |        |         /-----Richard Fitz Roy, Baron Of Chilham
|                          |                 |         \-----Lorette De DOVER
|                          |                 |                  \-----Rohese De DOVER
|                          |         /-----John MARMION, Lord Marmion
|                          |        |         \-----Isabel
|                           \-----Joan MARMION
|                                   |                           /-----Sir Thomas De FURNIVAL
|                                   |                  /-----Sir Thomas De FURNIVAL
|                                   |                 |         \-----Bertha De FERRERS
|                                   |         /-----Sir Thomas FURNIVAL, Lord Furnival
|                                    \-----Maud FURNIVAL
|                                            |                  /-----Sir Hugh Le DESPENSER
|                                            |         /-----Sir Hugh Le DESPENSER, Justiciar Of England
|                                             \-----Joan De DESPENSER
|                                                     |         /-----Sir Philip BASSET, Justiciar Of England
|                                                      \-----Aline BASSET
|                                                               \-----Hawise De LOUVAINE
Robert FITZWILLIAM
|                  /-----Sir Henry GREENE
|         /-----Sir Henry GREENE
|        |        |         /-----Sir Simon De DRAYTON
|        |         \-----Katherine De DRAYTON
 \-----Eleanor GREENE
         |                  /-----Sir John MAUDIT
         |         /-----Thomas MAUDIT
          \-----Maud MAUDIT



Descendants of Robert FITZWILLIAM
1. Robert FITZWILLIAM