Genealogy of the Marshall Family,
including Medieval and Ancient Lines

Updated: 01-20-2025.

Submitted and Maintained by Bill Marshall, bill.marshall@verizon.net.


Additions and corrections appreciated (especially with sources). My current list of sources is here. Homepage here.

Index of Medieval and Ancient Lines is here, notable people here, and Gedcom available to be downloaded.

Index of Modern Lines (immigrants to America and their descendants) is here, notable people here, and Gedcom here.


Individual Page


Family:
Marriage: Children:
  1. Oliver DEINCOURT Birth: 1
  2. John DEINCOURT, Baron Of Blankney Birth: Before 1140 Death: 6 Nov 1183
  3. Walter DEINCOURT Birth: 3
  4. Oliva DEINCOURT
  5. (Unk Dau) DEINCOURT

Bibliography
  1. Cokayne, George Edward, Complete Peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom, extant, extinct, or dormant, vol 04 Dacre-Dysart. London: St Catherine Press, 1916. Reprinted (4 per page) Gloucester: A Sutton, 1982. Available at https://familysearch.org/search/catalog/271412 Vol 4 also available at http://archive.org/completepeerageo04byucoka Information from this source tagged as [Ref: CP IV [Ap][p0-9].*].
  2. Allen, Kay, Deincourt-D'Eyncourt. Posting to soc.genealogy.medieval (email list GEN-MEDIEVAL) on 2/24/1999. Subject: Deincourt-D'Eyncourt. Available at https://groups.google.com/g/soc.genealogy.medieval/c/hVtkMuVf5zo/m/9LopcalsgH4J. Author address: allenk at pacbell dot net. Information from this source tagged as [Ref: Kay Allen SGM 2/24/1999].
  3. Keats-Rohan, K.S.B., Domesday Descendants, A Prosopography of Persons Occurring in English Documents 1066-1166. Vol II: Pipe Rolls to Cartae Baronum. Bury St Edmunds, Suffolk: Boydell Press, 2002. NYPL ARF 03-4178 vol 2. Corrections at http://users.ox.ac.uk/~prosop/domesday-descendants-corrigenda.pdf Information from this source tagged as [Ref: Keats-Rohan DD p[0-9]*].
  4. 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]*].

Sources for birth and parent Information
parents:
[Ref: CP IV p118(c), Kay Allen SGM 2/24/1999, Keats-Rohan DD p265],
father:
[Ref: Keats-Rohan DD p266, Sanders Baronies p15]
Sources for death Information
date:
[Ref: Keats-Rohan DD p266, Sanders Baronies p15]
Sources with Information about marriage to Agnes BASSET
child:
[Ref: Kay Allen SGM 2/24/1999, Keats-Rohan DD p265, Keats-Rohan DD p266]
Research Notes:
inherited Barony of Blankney from father [Ref: Sanders Baronies p15]

c.1158: succeeded his father [Ref: Keats-Rohan DD p266]



Pedigree of Walter DEINCOURT, Baron Of Blankney
          /-----Walter De AINCORT, Lord Of Blankney
 /-----Ralph DEINCOURT, Baron Of Blankney
|        |                                                      /-----Paskurtan Count Of Rennes
|        |                                             /-----Judhael Count Of Rennes
|        |                                            |         \-----(Unk Dau) Heiress Of Rennes
|        |                                    /-----Conan I Duke Of Brittany
|        |                                   |         \-----Gerberge
|        |                           /-----Geoffrey Duke Of Brittany
|        |                          |        |                  /-----Fulk II The Good Count Of Anjou
|        |                          |        |         /-----Geoffrey I Grisgonelle Count Of Anjou
|        |                          |        |        |         \-----Gerberga Of Nevers
|        |                          |         \-----Ermengarde Of Anjou
|        |                          |                 |         /-----Robert Count Of Troyes
|        |                          |                  \-----Adele Of Troyes
|        |                          |                           \-----Adelaide Of Burgundy
|        |                  /-----Eudes I Count Of Brittany
|        |                 |        |                           /-----Hrolfr (Rollo) Duke Of Normandy
|        |                 |        |                  /-----William Longspee Duke Of Normandy
|        |                 |        |                 |         \-----Poppa
|        |                 |        |         /-----Richard I The Fearless Duke Of Normandy
|        |                 |        |        |         \-----Espriota
|        |                 |         \-----Hawise Of Normandy
|        |                 |                 |         /-----(Unk) Forquelar Of Cirques
|        |                 |                  \-----Gunnora
|        |         /-----Alan The Red Count Of Brittany
|        |        |        |                           /-----Budic Count Of Cornuaille
|        |        |        |                  /-----Benoit Count Of Cornuaille
|        |        |        |         /-----Alain Cagnairt Count Of Cornuaille
|        |        |        |        |         \-----Guinodeon
|        |        |         \-----Agnes Of Cornuaille
|        |        |                 |                           /-----Alain II Barbe Torte Count Of Nantes
|        |        |                 |                  /-----Hoel Count Of Nantes
|        |        |                 |         /-----Judicael Count Of Nantes
|        |        |                  \-----Judith Of Nantes
|        |        |                           \-----Melisende
|         \-----Matilda
|                 |                                             /-----Aethelwerd The Historian Ealdorman In Wessex
|                 |                                    /-----Aethelmaer Cild The Great Ealdorman In Devonshire
|                 |                                   |         \-----Aethelflaed
|                 |                           /-----Wulfnoth Cild Thegn In Sussex
|                 |                          |         \-----Aethelthrith
|                 |                  /-----Godwin Ealdorman Of Wessex
|                 |         /-----Harold II Goodwinson, King Of England
|                 |        |        |                           /-----Olaf King Of Sweden
|                 |        |        |                  /-----Styr-Bjorn
|                 |        |        |                 |         \-----Ingelberg
|                 |        |        |         /-----Jarl Thorkill Sprakalaeg
|                 |        |        |        |        |         /-----Harald Blaatand King Of Denmark
|                 |        |        |        |         \-----Thyra
|                 |        |        |        |                  \-----Gunthilda
|                 |        |         \-----Githa
|                  \-----Gunhild
|                           \-----Ealdgith Swansneck
Walter DEINCOURT, Baron Of Blankney
 \-----Basilie



Descendants of Walter DEINCOURT, Baron Of Blankney
1. Walter DEINCOURT, Baron Of Blankney m. Agnes BASSET
m. Agnes BASSET

2nd generation

3. John DEINCOURT, Baron Of Blankney m. Alice MURDAC
m. Alice MURDAC father: Ralph MURDAC mother: Beatrice De CHESNEY

3rd generation

7. Oliver DEINCOURT, Baron Of Blankney m. Amabel
m. Amabel

4th generation

8. Oliver DEINCOURT, Baron Of Blankney m. Nichola De La HAY, Lady Of Munden
m. Nichola De La HAY, Lady Of Munden father: Richard De La HAY, Baron Of Brattleby mother: Matilda De VERNON

5th generation

9. Sir John DEINCOURT, Baron Of Blankney m. Agnes De NEVILLE
m. Agnes De NEVILLE father: Geoffrey FITZ ROBERT De NEVILL mother: Joan