Family:
Marriage:
                Children:
- Joan WILLOUGHBY  Death: After 1404
- Elizabeth WILLOUGHBY  
- Sir Robert De WILLOUGHBY, Lord Willoughby  Birth: Abt 1349
Death: 9 Aug 1396
Bibliography
- 
National Archives - UK government records and information management. http://www.nationalarchives.gov.uk. Specific record at http://www.nationalarchives.gov.uk/a2a/records.aspx?cat=057-holywell&cid=88-51&kw=Holywell%2087/52#88-51. Visited 8/24/2008 Information from this source tagged as [Ref: A2A Holywell 87/52].
- 
Banks, Thomas Christopher, Baronia anglica concentrata: or, A concentrated account of all the baronies commonly called baronies in fee; deriving their origin from writ of summons, and not from any specific limited creation. London: Simpkin, 1844. Available at https://archive.org/details/baroniaanglicaco01bankuoft. Information from this source tagged as [Ref: Banks Baronies v[1-2]p[0-9]*].
- 
Beltz, George Frederick, Memorials of the most noble Order of the Garter. London: Pickering, 1841. Available at http://archive.org/details/memorialsofmostn00beltuoft Information from this source tagged as [Ref: Beltz KnightsofGarter p[0-9]*].
- 
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]*].
- 
Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 12-2, Tracton-Zz. London: St Catherine Press, 1959. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Information from this source tagged as [Ref: CP XII/2 [Ap][p0-9].*].
- 
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++ .*].
- 
Richardson, Douglas, Marriage of John Willoughby and Cecily de Ufford. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 6/8/2004. Subject: C.P. Addition: Marriage of John Willoughby & Cecily de Ufford. Available at https://groups.google.com/g/soc.genealogy.medieval/c/GqsF2_6RLVE/m/rdNJF6idVkUJ. Author address: royalancestry at msn dot com. Information from this source tagged as [Ref: Douglas Richardson SGM 6/8/2004-214836].
- 
Richardson, Douglas, Children of Robert de Uffford, 1st Earl of Suffolk. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 7/1/2010. Subject: Complete Peerage Addition: Children of Robert de Uffford, 1st Earl of Suffolk (died 1369). Available at https://groups.google.com/g/soc.genealogy.medieval/c/k9DQ6iFAKJw/m/8Pbej2yfPw0J. Author address: royalancestry at msn dot com. Information from this source tagged as [Ref: Douglas Richardson SGM 7/1/2010-110356].
- 
Richardson, Douglas, Plantagenet Ancestry: A Study in Colonial and Medieval Families. Baltimore, MD: Genelogical Publishing Co, 2004. Information from this source tagged as [Ref: Richardson PA p[0-9]*].
- 
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 v1[pc][0-9]*].
- 
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 v4p[0-9]*].
- 
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 v5p[0-9]*].
- parents: 
- [Ref: Banks Baronies v1p440, Beltz KnightsofGarter p101, Beltz
KnightsofGarter p212, CP XII/2 p660],
- father: 
- [Ref: Burke Peerage p51, Richardson PA p45, Richardson RoyalAnc
v1p172, Richardson RoyalAnc v4p231, Richardson RoyalAnc v5p360]
Sources for death Information
- date: 
- before husband [Ref: CP XII/2 p660]
Sources with Information about marriage to Sir John WILLOUGHBY, Lord Willoughby
- date: 
- before 1349 [Ref: CP XII/2 p660]
-       before 18 Aug 1337 [Ref: A2A Holywell 87/52, CP++ Willoughby 7/13/2004
(CP XII/2 p660), Douglas Richardson SGM 6/8/2004-214836],
- names: 
- [Ref: Banks Baronies v1p440, Beltz KnightsofGarter p101]
-        ___ WILLOUGHBY & Cecily De UFFORD [Ref: Douglas Richardson SGM
7/1/2010-110356],
- child: 
- [Ref: Beltz KnightsofGarter p212, Burke Peerage p51, CP XII/2 p660,
Richardson PA p45, Richardson RoyalAnc v1p172, Richardson RoyalAnc v5p360]
Sources with Inaccurate marriage information
- child: 
- Margaret WILLOUGHBY (#217856) [Ref: Burke Peerage p1850]
Research Notes:
heir of her brother William [Ref: CP XII/2 p660]
  
Pedigree of Cecily De UFFORD
                   /-----
Robert De UFFORD, Justiciar Of Ireland
          /-----
Sir Robert De UFFORD, Lord Ufford
         |         \-----
Mary  
 /-----
Robert De UFFORD, K.G., Earl of Suffolk
|        |                                                      /-----
Theobald De VALOINES, Lord Of Parham
|        |                                             /-----
Robert De VALOINES
|        |                                            |         \-----
Helewise  
|        |                                    /-----
(Unk) De VALOINES
|        |                                   |         \-----
Alice  
|        |                           /-----
John De VALOINES
|        |                  /-----
Robert De VALOINES
|        |                 |        |                           /-----
Bartholomew De CREC
|        |                 |        |                  /-----
Bartholomew De CREC
|        |                 |        |         /-----
Robert De CREC
|        |                 |         \-----
Isabel De CREC
|        |                 |                 |                  /-----
Hervey De GLANVILLE
|        |                 |                 |         /-----
William De GLANVILLE
|        |                 |                 |        |         \-----
Mabel  
|        |                 |                  \-----
Agnes De GLANVILLE
|        |                 |                          |         /-----
Jordan De LENVEISE
|        |                 |                           \-----
Denise De LENVEISE
|        |                 |                                    \-----
Cecily De ARUNDEL
|        |         /-----
Robert De VALOINES
|        |        |        |                                    /-----
Gilbert BLUND, Lord Of Ashfield
|        |        |        |                           /-----
William BLUND, Lord Of Ashfield
|        |        |        |                  /-----
Hubert BLUND, Lord Of Ashfield
|        |        |        |                 |        |         /-----
Hubert De MOUNTCHESNEY
|        |        |        |                 |         \-----
(Unk Dau) De MOUNTCHESNEY
|        |        |        |         /-----
William BLUND, Lord Of Ashfield
|        |        |         \-----
Rose BLUND
|         \-----
Cecily De VALOINES
|                  \-----
Eve  
Cecily De UFFORD
|                  /-----
Geoffrey De NORWICH
|         /-----
Sir Walter De NORWICH
 \-----
Margaret De NORWICH
         |         /-----
Sir John De HEDERSETE
          \-----
Catherine De HEDERSETE
  Descendants of Cecily De UFFORD
2nd generation 
3rd generation 
4th generation 
5th generation