Constance, Countess of Brittany, b. 12 June 1161 in Brittany, France, m. Ranulf de Blondeville, 6th Earl of Chester, 3 February 1188, annulled 1198, d. 5 September 1201 in Nantes, France, bur. Villenueve Abbey, Nantes, France

Father: Conan IV, Duke of Brittany, b. 1138 in Brittany, France, d. 20 February 1171
Mother: Margaret of Huntingdon, b. ABT 1140
Some sources claim Constance had another daughter, Margaret, who married Geoffrey I, Viscount of Rohan.

Spouse: Geoffrey Plantagenet, b. ABT 1155 in Bermondsey, England, d. 19 August 1186 in Paris, France, cause of death was trampling in a riding accident during a tournament

Father: Henry II, King of England, b. 5 March 1132 in LeMons, Anjou, France, d. 6 July 1189 in Chinon, France, Became first Plantagenet king of England, 19 December 1154 in Westminster Abbey, London, Middlesex, England
Mother: Eleanor of Aquitaine, b. ABT 1122 in Aquitaine, France, m. Louis VII, King of France, 22 July 1137 in Bordeaux, Aquitaine, France, div. 1152, d. 3 March 1204 in Maine-et-Loire, France
Married 1181.

Children:

  1. Eleanor, Fair Maid of Brittany, b. ABT 1185 in Brittany, France
  2. Arthur of Brittany, b. 1187, imprisoned, 1203 in Château de Falaise

Spouse: Guy de Thouars, d. 12 April 1213 in Chemille, Maine, France

Father: Geoffroy IV of Thouars
Mother: Aénor de Lusignon
Married 1199 in Angers, Anjou, France.

Children:

  1. Alix de Thouars, Duchess of Brittany, b. 5 September 1201 in Brittany, France, m. Peter I, Duke of Brittany, 27 January 1213, d. 21 October 1221, cause of death was childbirth, bur. 24 November 1221 in Villenueve Abbey, Nantes, France
  2. Katherine of Thouars, Dame of Vitre, b. 5 September 1201 in Brittany, France, m. Andrew III, Baron of Vitre, 1212

Conan IV, Duke of Brittany, b. 1138 in Brittany, France, d. 20 February 1171

Father: Alan "the Black", 1st Earl of Richmond, b. bef. 1000, d. 15 September 1146 in Brittany, France, bur. Bégard Monastery, Brittany, France
Mother: Bertha of Brittany, m. Odo, Viscount of Porhoet, ABT 1148, d. 1156
He was also called Conan IV of Penthiévre and Conan "the Young". Conan was the 2nd Earl of Richmond.

Spouse: Margaret of Huntingdon, b. ABT 1140

Father: Henry, Prince of Scotland, b. 1114 in Northumberland, England, d. 1152
Mother: Ada de Warenne
Married 1160.

Children:

  1. Constance, Countess of Brittany, b. 12 June 1161 in Brittany, France, m. Geoffrey Plantagenet, 1181, m. Ranulf de Blondeville, 6th Earl of Chester, 3 February 1188, annulled 1198, m. Guy de Thouars, 1199 in Angers, Anjou, France, d. 5 September 1201 in Nantes, France, bur. Villenueve Abbey, Nantes, France

Alan "the Black", 1st Earl of Richmond, b. bef. 1000, d. 15 September 1146 in Brittany, France, bur. Bégard Monastery, Brittany, France

Father: Stephen, Count of Tréguier, b. 1058/62, d. 21 April 1136, bur. in York, England
Mother: Hawise de Guingamp

Children:

  1. Bryan fitzAlan
  2. Stephen fitzAlan
  3. Reynold fitzAlan
  4. Robert fitzAlan

Spouse: Bertha of Brittany, b. ABT 1114, m. Odo, Viscount of Porhoet, ABT 1148, d. 1156

Father: Conan III "the Fat" of Brittany, b. 1093/6, d. 17 September 1148
Mother: Maud of England, b. ABT 1123
Married bef. 1138.

Children:

  1. Conan IV, Duke of Brittany, b. 1138 in Brittany, France, m. Margaret of Huntingdon, 1160, d. 20 February 1171
  2. Constance of Brittany, m. Alan III, Viscount of Rohan
  3. Enougen of Brittany, Abbess of St. Sulpice

Stephen, Count of Tréguier, b. 1058/62, d. 21 April 1136, bur. in York, England

Father: Odo, Count of Penthiévre, b. ABT 999, d. ABT 1079 in Cesson, Ile-de-France, France
Mother: Agnes of Cornouaille
Stephen is sometimes misidentified as Count of Brittany in court documents of King Henry I. He was also the 3rd Lord of Richmond.

Spouse: Hawise de Guingamp

Married

Children:

  1. Geoffrey II "Boterel", Count of Penthiévre, m. Hawise de Dol
  2. Alan "the Black", 1st Earl of Richmond, b. bef. 1000, m. Bertha of Brittany, bef. 1138, d. 15 September 1146 in Brittany, France, bur. Bégard Monastery, Brittany, France
  3. Henry, Count of Tréguier, m. Mathilde de Vendome
  4. Maud of Tréguier, m. Walter de Gaunt
  5. Olive of Tréguier, m. Henry de Fougéres, m. William de St. John
  6. Theophania (Tiphanie) of Tréguier, m. Rabel de Tancarville, Chamberlain of Normandy
  7. Eléonore of Tréguier, m. Alan de Dinan

Odo, Count of Penthiévre, b. ABT 999, d. 7 January 1079 in Cesson, Ile-de-France, France

Father: Godfrey (Geoffrey), Duke of Brittany, b. ABT 981 in Rennes, Brittany, France, d. 20 November 1008
Mother: Hawise of Normandy, b. ABT 990 in Normandy, France
Odo was also known as Eozen and Eudo, and is sometimes listed as Odo of Rennes. Odo's son Alan "Rufus" is sometimes confused with his grandson by Stephen, Alan "the Black". Some sources even claim they are both his son.

Children:

  1. Ribald, Lord of Middleham
  2. Bardolf, Lord of Ravensworth
  3. Bodin, Lord of Bedale
  4. Derrien, Lord of la Roche-Derrien
Spouse: Agnes of Cornouaille (Orguen Kernev)
Father: Alain Canhiart, Count of Cornouaille, d. 1058
Mother: Judith of Nantes
Married

Children:

  1. Adele of Rennes, b. ABT 1035, d. aft. 1056/7
  2. Geoffrey Boterel I, Count of Penthiévre, d. 24 August 1093
  3. Brian, Earl of Cornwall, d. aft. 1084
  4. Alan "Rufus", Lord of Richmond, d. 1093/8
  5. Stephen, Count of Tréguier, b. 1058/62, m. Hawise de Guingamp, d. 21 April 1136, bur. in York, England
  6. Robert of Rennes, d. aft. 1083
  7. Richard, Canon of Bayeux
  8. William (Guillaume) of Rennes
  9. Daughter of Rennes, m. Enisandus Musardus de Pleveno

Alain Canhiart, Count of Cornouaille, d. 1058

Father: Benoít (Benedic), Count-Bishop of Cornouaille, d. bet. 1008/1029
Mother: Guigoëdon (Guiguoedon) le Grand
Alain's mother was the daughter of Orscand le Grand, Bishop of Vannes. He was buried at Quimperle, but his tomb was destroyed during the French Revolution.
Spouse: Judith of Nantes
Father: Judicael of Nantes
Married

Children:

  1. Hoel II, Duke of Brittany, b. ABT 1031, m. Hawise of Brittany, bef. 1058, d. 1084
  2. Guérech (Quiriac), Bishop of Nantes, b. 1030, d. 1079
  3. Budic of Cornouaille, d. 1091
  4. Hodiern, Abbess of Locmaria de Quimper
  5. Benoît, Bishop of Nantes, d. 1115, cause of death was murder
  6. Agnes of Cornouaille (Orguen Kernev), m. Odo, Count of Penthiévre

Odo, Viscount of Porhoet

Father: father
Mother: mother
may be the Eudes son of Geoffrey, Viscount of Porhoet Spouse: Bertha of Brittany, b. ABT 1114, m. Alan "the Black", 1st Earl of Richmond, d. 1156
Father: Conan III of Brittany
Mother: Maud of England
Married ABT 1148

Children:

  1. Geoffroy de Porhoet
  2. Adelaide de Porhoet, Abbess of Fontevrault, d. 1220
  3. Alix of Porhoet, mistress of Henry II "Curtmantle", King of England

Guy de Thouars, d. 12 April 1213 in Chemille, Maine, France

Father: Geoffroy IV of Thouars
Mother: Aénor de Lusignan
Spouse: Constance, Countess of Brittany, b. 1162 in Brittany, France, d. 1201
Father: Conan IV, Duke of Brittany, b. in Brittany, France, d. 1171
Mother: Margaret of Huntingdon, b. ABT 1140
Married 1199 in Angers, Anjou, France

Children:

  1. Alix de Thouars, Duchess of Brittany, b. 5 September 1201 in Brittany, France, m. Peter I, Duke of Brittany, 27 January 1213, d. 21 October 1221, cause of death was childbirth, bur. 24 November 1221 in Villenueve Abbey, Nantes, France
  2. Katherine of Thouars, Dame of Vitre, b. 5 September 1201 in Brittany, France, m. Andrew III, Baron of Vitre, 1212

Spouse: Eustachie of Chemillé

Married 1203

Children:

  1. Peter, Lord of Chemillé, b. 1204, m. Eleanor of Porhoet, d. 1254/5
  2. Thomas of Chemillé, d. aft. January 1246

Geoffroy IV of Thouars

Father: Aimery V of Thouars
Mother: Agnes of Aquitaine, m. Ramiro II Sanchez "the Monk", King of Aragon, 1135
Spouse: Aénor de Lusignon, b. ABT 1130
Father: Hugh VII "le Brun" of Lusignan, b. 1065, d. 1151
Mother: Serrasine (Saracena) de Lezay, b. 1067, d. 1144
Married

Children:

  1. Guy de Thouars, m. Constance, Countess of Brittany, 1199 in Angers, Anjou, France, d. 12 April 1213 in Chemille, Maine, France
  2. Hugh I de Thouars, m. Marguerite de Montaigu, d. 1230

Aimery V of Thouars

Father: Geoffroy III of Thouars
Mother: Ameline
Spouse: Agnes of Aquitaine, m. Ramiro II Sanchez "the Monk", King of Aragon, 1135
Father: William IX The Troubador, Duke of Aquitaine, b. ABT 22 October 1080, m. Ermengarde of Anjou, 1089, d. 10 February 1126
Mother: Philippa of Toulouse, d. 28 November 1118 at Fontevrault, Aquitaine, France
Married

Children:

  1. Geoffroy IV of Thouars, m. Aénor de Lusignan

Geoffroy III of Thouars

Father: Aimery IV of Thouars, d. 1093 in Verberie sur Oise, France
Mother: Ameline
Some sources say his mother was Aremgarde I of Mauleon, his father's first wife.
Spouse: Ameline
Married

Children:

  1. Aimery V of Thouars, m. Agnes of Aquitaine

Conan III "the Fat" of Brittany, b. 1093/6, d. 17 September 1148

Father: Alan IV "Fergant" Duke of Brittany, b. 1063 in Brittany, France, d. 13 October 1119 in Redon Abbey, Redon, Brittany, France
Mother: Ermengarde III of Anjou, b. ABT 1068 in Anjou, France, m. William IX The Troubador, Duke of Aquitaine, 1089, dissolved 1091, d. 1 June 1146 in Brittany, France
On his deathbed Conan disinherited his son Hoel, claiming he was illegitimate. Hoel was allowed to keep Nantes but Brittany went to his sister Bertha. Her marriage to Alan "the Black", 1st Earl of Richmond unified Brittany. Some historians suspect this was Conan's scheme all along, though it would have required years of planning.

Spouse: Maud of England

Father: Henry I "Beauclerc" King of England, b. September 1068 in Selby, Yorkshire, England, d. 1 December 1135 in Rouen, Normandy, France, He acceded to the throne of England, 2 August 1100 in Westminster Abbey, London, Middlesex, England, cause of death was overeating lampreys.
Married.

Children:

  1. Hoel, Count of Nantes, d. 1156
  2. Bertha of Brittany, b. ABT 1114, m. Alan "the Black", 1st Earl of Richmond, bef. 1138, m. Odo, Viscount of Porhoet, ABT 1148, d. 1156
  3. Constance of Brittany, b. ABT 1110, m. Alan la Zouche



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