Eudon of Brittany

- 1079

• Name	Eudon of Brittany
  Gender	Male
  Death	7 Jan 1079
  Burial	Saint Brieuc Cathedral, Saint Brieuc, Brittany, France
  Person ID	I7120	Petersen-de Lanskoy
  Last Modified	21 Jun 2026

  
  

  Father	Geoffroi I   d. 20 Nov 1008
  Mother	Hawise of Normandy   d. 21 Feb 1034
  Marriage	From 996 to 999
  Family ID	F3232	Group Sheet  |  Family Chart

  
  

  Family 1	Orguen   d. Aft 1060
  Children	1. Stephen of Brittany   d. From 21 Apr 1135 to 21 Apr 1136   2. Geoffrey Boterel I of Brittany   3. Alan "the Red" of Brittany   4. Guillaume of Brittany   5. Robert of Brittany   6. Richard of Brittany   7. Alan "the Black" of Brittany   8. Brian of Brittany
  Family ID	F3214	Group Sheet  |  Family Chart
  Last Modified	30 Jun 2026

  
  

  Family 2
  Children	1. Bodin of Brittany   2. Bardulf of Brittany   3. Ribald of Brittany   4. Ernulf of Brittany
  Family ID	F3231	Group Sheet  |  Family Chart
  Last Modified	30 Jun 2026

  
  

• Notes

  RESEARCH_NOTES: 1. “Royal Ancestry: A Study in Colonial & Medieval Families,” Douglas Richardson (2013): “EUDON OF BRITTANY, Count (or Duke) of Brittany, 2nd son. He married ORGUEN ___. They had eight sons, Geoffrey Boterel [I] [Count of Brittany], Alan the Red [Count of Brittany, lord of Richmond], Guillaume, Robert, Richard, Alan the Black [Count of Brittany, lord of Richmond], Brian [Count of Brittany], and Stephen or (Étienne) [Count of Brittany, lord of Richmond). By an unknown mistress (or mistresses), he also had four illegitimate sons, Bodin, Bardulf, Ribald, and Ernulf. During Their mother's lifetime, he and his older brother, Alan, seem to have been joint rulers of Brittany, but on her death in 1034, dissension broke out between them. Peace was restored by a settlement under which Eudon received a territory corresponding roughly to the dioceses of Dol, St. Malo, St. Brieuc, and Tréguier. After the death of Alan in 1140, Eudon seized the government of Brittany to the exclusion of Alan's son, Conan, who recovered it in 1057. His wife, Orguen, was living in 1056-60 (date of charter). EUDON OF BRITTANY died 7 Jan. 1079, and is said to have been buried in the Cathedral of St. Brieuc. Morice Histoire Ecclésiastique et Civil de Bretagne 1 (1750): xiii-xv (Counts of Cornouaille ped.) (author identifies Orguen or Agnes, wife of Eudon, Count of Penthièvre, as daughter of Benedic, Count of Cornouaille), xvii-xviii (Counts of Penthièvre ped). Recueil des Historiens des Gaules et de la France 12 (1874): 557 (Ex Chronico Britannico: ("MLXXIX [A.D. 10791. Obiit Eudo Dux Brittaniae."). Broussillon Cartulaire de l'Abbaye de Saint-Aubin d'Angers 2 (1903): 171-174. C.P. 10 (1945): 780 (chart), 779, 781 (sub Richmond). Le Baud Histoire de Bretagne (1638): 155 (author identifies "Ouuen," wife of Eudon of Brittany, as daughter of Allain Caignart, Count of Comouaille). Schwennicke Europäische Stammtafeln 2 (1984): 75. Winter Descs. of Charlemagne (800-1400) (1987): XI.11, XII.12-XII.16d.” 2. “Royal Ancestry: A Study in Colonial & Medieval Families,” Douglas Richardson (2013): “GEOFFROI I, Duke of Brittany, son and heir. He married between 996 and 999 HAWISE OF NORMANDY, legitimated daughter of Richard I, Duke of Nomandy, by his 2nd wife, Gonnor. They had two sons, Alan [Duke of Brittany] and Eudon [Count (or Duke) of Brittany], and one daughter, Adele [Abbess of Saint-Georges at Rennes]. GEOFFROI I, Duke of Brittany, died 20 Nov. 1008. His widow, Hawise, died 21 Feb. 1034. Recueil des Historiens des Gaules et de la France 10 (1874): 175 (Ex Chronico S. Michaelis: "MVIII [A.D. 1008]. Obiit Gaufredus Dux Britanniæ filius Conani filii Juhelli Berengarii, dum pergeret Romam causa ocationis. Hujus sororem Judith duxit secundus Ricardus Dux Normannorum: et ipse Gaufredus duxit Havidem sororem prædicti Richardi, ex qua genuit duos filios Alanum et Eudonem, qui ei succcessit, partito Ducatu Britannia."), 294 (Ex Chronico Kemperlegiensi: "MVIII [A.D. 1008]. Obiit Gauffridus Dux Britannia, filius Conani filii Juhaelis Berengarii, dum pergeret Romam gratia orationis."), 294 (Ex Chronico Kemperlegiensi: "MXXXIV [A.D. 1034]. Haduisa Comitissa Britannia, vidua Gauffridi, et mater Alani et Eudonis, IX Kal. Martii [21 Feb.] obiit."). Brandenburg Die Nachkommen Karls des Großen (1935) X 9. C.P. 10 (1945): 780 (chart), 779, 781 (sub Richmond). Schwennicke Europäische Stammtafeln 2 (1984): 75. Winter Descs. of Charlemagne (800-1400) (1987): X.6, XI.9-X.I.11.”