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, Baron Of Blankney Birth: Abt 1161 Death: Before 1201

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
date:
before 1140 [Ref: Kay Allen SGM 2/24/1999]
second son [Ref: Keats-Rohan DD p266],
parents:
[Ref: Kay Allen SGM 2/24/1999, Keats-Rohan DD p265, Keats-Rohan DD p266],
father:
[Ref: CP IV p118(c), Sanders Baronies p15]
Sources for death Information
date:
[Ref: CP IV p118(c), Kay Allen SGM 2/24/1999]
1183 [Ref: Sanders Baronies p15]
before 1185 [Ref: Keats-Rohan DD p1047]
Sources with Information about marriage to Alice MURDAC
names:
[Ref: Keats-Rohan DD p1047],
child:
[Ref: CP IV p118(c), Kay Allen SGM 2/24/1999, Keats-Rohan DD p265]
Research Notes:
1167-8: had livery of his lands [Ref: CP IV p118(c)]

inherited Barony of Blankney from father [Ref: Sanders Baronies p15]

1168-83: head of the Aincurt fief [Ref: Keats-Rohan DD p265]



Pedigree of John DEINCOURT, Baron Of Blankney
                   /-----Walter De AINCORT, Lord Of Blankney
          /-----Ralph DEINCOURT, Baron Of Blankney
         |        |                                             /-----Judhael Count Of Rennes
         |        |                                    /-----Conan I Duke Of Brittany
         |        |                                   |         \-----Gerberge
         |        |                           /-----Geoffrey Duke Of Brittany
         |        |                          |        |         /-----Geoffrey I Grisgonelle Count Of Anjou
         |        |                          |         \-----Ermengarde Of Anjou
         |        |                          |                  \-----Adele Of Troyes
         |        |                  /-----Eudes I Count Of Brittany
         |        |                 |        |                  /-----William Longspee Duke Of Normandy
         |        |                 |        |         /-----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
         |        |        |                 |                  /-----Hoel Count Of Nantes
         |        |        |                 |         /-----Judicael Count Of Nantes
         |        |        |                  \-----Judith Of Nantes
         |        |        |                           \-----Melisende
         |         \-----Matilda
         |                 |                                    /-----Aethelmaer Cild The Great Ealdorman In Devonshire
         |                 |                           /-----Wulfnoth Cild Thegn In Sussex
         |                 |                          |         \-----Aethelthrith
         |                 |                  /-----Godwin Ealdorman Of Wessex
         |                 |         /-----Harold II Goodwinson, King Of England
         |                 |        |        |                  /-----Styr-Bjorn
         |                 |        |        |         /-----Jarl Thorkill Sprakalaeg
         |                 |        |        |        |         \-----Thyra
         |                 |        |         \-----Githa
         |                  \-----Gunhild
         |                           \-----Ealdgith Swansneck
 /-----Walter DEINCOURT, Baron Of Blankney
|         \-----Basilie
John DEINCOURT, Baron Of Blankney
 \-----Agnes BASSET



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

2nd generation

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

3rd generation

3. 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

4th generation

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

5th generation

5. Sir Edmund DEINCOURT, Lord Deincourt m. Isabel De MOHUN
m. Isabel De MOHUN father: Sir Reynold De MOHUN, Baron Of Dunster mother: Hawise FITZ GEOFFREY