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:
Children:
  1. Agnes Of Thiern

Bibliography
  1. Schwennicke, Detlev, ed., Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten, New Series. II: Die Ausserdeutschen Staaten Die Regierenden Hauser der Ubrigen Staaten Europas. Marburg: Verlag von J. A. Stargardt, 1984. Information from this source tagged as [Ref: ES II #[0-9]*].
  2. Schwennicke, Detlev, ed., Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten, New Series. III.3 (#401-#600): Andere Grosse Eurpaische Familien, Illegitime Nachkommen Spanischer und Portugiesischer Konigshauser. Marburg: Verlag von J. A. Stargardt, 1985. Information from this source tagged as [Ref: ES III.3 #[0-9]*].
  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
father:
[Ref: ES III.3 #433]
Sources with Information about marriage to unknown
child:
[Ref: ES II #20, ES III.3 #433, Richardson RoyalAnc v2p469]
Research Notes:
Seigneur of Monpensier [Ref: Richardson RoyalAnc v2p469]
sn de Montpensier [Ref: ES III.3 #433]



Pedigree of Guy Lord Of Montpensier
          /-----Guillaume Of Thiern
 /-----Guy De Thiern, Count Of Chalon
|        |                                             /-----Froilan De Semur, Seigneur De Semur
|        |                                    /-----Joceran Seigneur De Semur
|        |                           /-----Geoffrey I Seigneur De Semur
|        |                          |         \-----Ricosire
|        |                  /-----Geoffrey II Seigneur De Semur
|        |         /-----Thibaud Count Of Chalons
|        |        |        |                  /-----Robert Vicomte Of Dijon, Count Of Auton
|        |        |        |         /-----Lambert Count Of Chalons, Viconte Of Dijon
|        |        |        |        |         \-----Engeltrude
|        |        |         \-----Mahaut Heiress Of Chalons
|        |        |                  \-----Adelaide Heiress of Chalons
|         \-----Adelaide Of Chalon
|                  \-----Ermentrude
Guy Lord Of Montpensier



Descendants of Guy Lord Of Montpensier
1. Guy Lord Of Montpensier m.

2nd generation

2. Agnes Of Thiern m1. Raymond Of Burgundy, Count Of Grignon m2. Humbert IV Of Beaujeu
m. Raymond Of Burgundy, Count Of Grignon father: Hugh II Duke Of Burgundy mother: Mechtild Of Mayenne
m. Humbert IV Of Beaujeu father: Humbert III Of Beaujeu mother: Alix/Elsa Of Savoy

3rd generation

3. Mathilda Of Burgundy, Countess Of Grignon m1. Eudes III De Isoudun m2. Guy I Count Of Nevers D'Auxerre m3. Peter Of Flanders, Count Of Nevers m4. Robert II Count Of Dreux
m. Eudes III De Isoudun
m. Guy I Count Of Nevers D'Auxerre father: William III Count Of Nevers D'Auxerre mother: Ida Of Karnten
m. Peter Of Flanders, Count Of Nevers father: Thierry Of Lorraine, Count Of Flanders mother: Sybil Of Anjou
m. Robert II Count Of Dreux father: Robert I Count Of Dreux mother: Agnes De Baudemont
4. Guichard IV The Great Sire De Beaujeu m. Sibylle Of Flanders
m. Sibylle Of Flanders father: Baldwin V Count Of Hainaut And Namur mother: Margarite Of Lorraine, Heiress Of Flanders

4th generation

5. Agnes Countess Of Nevers m. Peter De COURTENAY, Emperor Of Constantinople
m. Peter De COURTENAY, Emperor Of Constantinople father: Peter Of France, Lord Of Courteney mother: Elizabeth De Courtenay
6. Sybille Of Flanders m. Robert I Seneschall Of Flanders
m. Robert I Seneschall Of Flanders father: Hellin I Of Wavrin, Seneschall Of Flanders mother: Tirsella Of Arras
7. Agnes De Beaujeu m. Theobald I King Of Navarre
m. Theobald I King Of Navarre father: Theobald III Count Of Champagne mother: Blanche Of Navarre
8. Humbert Lord Of Beaujeu m. Marguerite Of Miribel
m. Marguerite Of Miribel father: Guy I Lord Of Bauge And Miribel
9. Guichard II Lord Of Montpensier m. Catherine Dauphine Of Clermont
m. Catherine Dauphine Of Clermont father: Guillaume II Count Of Clermont mother: Isabeau Of Montlucon
10. Sibylle Of Beaujeu m1. Raynold IV Lord Of Bauge And Bresse m2. Pierre The Great Of Brancion, Lord Of Visargent
m. Raynold IV Lord Of Bauge And Bresse father: Ulric II Lord Of Bauge And Bresse mother: Alexandrine Of Vienne
m. Pierre The Great Of Brancion, Lord Of Visargent

5th generation

11. Mahaut De Courtenay m1. Herve IV Count Of Donzy m2. Guy IV Count Of Forez
m. Herve IV Count Of Donzy father: Herve III Count Of Donzy mother: Mathilde GOUET
m. Guy IV Count Of Forez father: Guy III Count Of Forez mother: Adalasia
12. Hellin II Seneschall Of Flanders m. Elizabeth Of Montmirail
m. Elizabeth Of Montmirail father: John Seigneur De Montmirel mother: Helvide Of Dampierre
13. Blanche Of Navarre m. John Le Roux De BRETAGNE, Duke Of Brittany
m. John Le Roux De BRETAGNE, Duke Of Brittany father: Pierre De DREUX, Count Of Brittany mother: Alix De THOUARS, Duchess Of Brittany
14. Sibylle De Beaujeu m. Aymar III Of Poitiers Count Of Valentinois
m. Aymar III Of Poitiers Count Of Valentinois father: Guillaume II Count Of Valentinois mother: Flotte De Royans
15. Elisabeth/Isabelle Of Beaujeu m. Renaud Count Of Forez
m. Renaud Count Of Forez father: Guy IV Count Of Forez mother: Mahaut De Courtenay
16. Humbert II Lord Of Montpensier m. Isabelle De Mello
m. Isabelle De Mello father: Guillaume De Mello
17. Guy Of Bauge, Lord Of Beaujeu And Bresse m. Beatrix Of Montferrat
m. Beatrix Of Montferrat father: William VI Margrave Of Montferrat mother: Berta De Clavesana