Biography of Bertha Canhiart I Duchess Brittany 1124-1155

Before 1113 [her father] Conan "Fat" Canhiart III Duke Brittany (age 17) and [her mother] Matilda Fitzroy Duchess Brittany were married. She by marriage Duchess Brittany. She the illegitmate daughter of [her grandfather] King Henry I "Beauclerc" England (age 44). He the son of [her grandfather] Alan Canhiart IV Duke Brittany (age 49) and [her grandmother] Ermengarde Anjou Duchess Brittany and Aquitaine (age 44). They were fourth cousins.

On 13 Oct 1119 [her grandfather] Alan Canhiart IV Duke Brittany (age 56) died. His son [her father] Conan "Fat" Canhiart III Duke Brittany (age 23) succeeded III Duke Brittany.

Before 1125 Bertha Canhiart I Duchess Brittany was born to Conan "Fat" Canhiart III Duke Brittany (age 28) and Matilda Fitzroy Duchess Brittany. She a granddaughter of King Henry I "Beauclerc" England.

In 1136 [her future husband] Alan "Black" Penthièvre 1st Earl Richmond (age 36) was created 1st Earl Richmond.

Before 1138 Alan "Black" Penthièvre 1st Earl Richmond (age 38) and Bertha Canhiart I Duchess Brittany (age 13) were married. She by marriage Countess Richmond. The difference in their ages was 25 years. She the daughter of Conan "Fat" Canhiart III Duke Brittany (age 41) and Matilda Fitzroy Duchess Brittany. He the son of Stephen Penthièvre Count Tréguier and Hawise Guingamp. They were half second cousin once removed. She a granddaughter of King Henry I "Beauclerc" England.

In 1138 [her son] Conan "The Young" Penthièvre IV Duke Brittany was born to [her husband] Alan "Black" Penthièvre 1st Earl Richmond (age 38) and Bertha Canhiart I Duchess Brittany (age 13). He a great grandson of King Henry I "Beauclerc" England.

On 15 Sep 1146 [her husband] Alan "Black" Penthièvre 1st Earl Richmond (age 46) died at Brittany [Map]. His son [her son] Conan "The Young" Penthièvre IV Duke Brittany (age 8) succeeded 2nd Earl Richmond.

In 1148 Odo II Duke Brittany and Bertha Canhiart I Duchess Brittany (age 23) were married. She the daughter of Conan "Fat" Canhiart III Duke Brittany (age 52) and Matilda Fitzroy Duchess Brittany. She a granddaughter of King Henry I "Beauclerc" England.

In 1148 [her former brother-in-law] Geoffrey "Boterel" Penthièvre II Count Penthièvre died.

In 1148 Eudes Rohan Viscount Porhoët and Bertha Canhiart I Duchess Brittany (age 23) were married. She the daughter of Conan "Fat" Canhiart III Duke Brittany (age 52) and Matilda Fitzroy Duchess Brittany. She a granddaughter of King Henry I "Beauclerc" England.

On 17 Sep 1148 [her father] Conan "Fat" Canhiart III Duke Brittany (age 52) died. He had disinherited his son Hoel on his deathbed for being illegitimate. His daughter Bertha Canhiart I Duchess Brittany (age 23) succeeded I Duchess Brittany. [her husband] Odo II Duke Brittany by marriage Duke Brittany.

In 1155 Bertha Canhiart I Duchess Brittany (age 30) died. Her son [her son] Conan "The Young" Penthièvre IV Duke Brittany (age 17) succeeded IV Duke Brittany.

After 1180 [her former husband] Odo II Duke Brittany died.

[her son] Conan "The Young" Penthièvre IV Duke Brittany and Margaret Dunkeld Duchess Brittany were married. She by marriage Duchess Brittany. She the daughter of Henry Dunkeld 3rd Earl Huntingdon 1st Earl of Northumbria and Ada Warenne Countess Huntingdon and Northumbria. He the son of Alan "Black" Penthièvre 1st Earl Richmond and Bertha Canhiart I Duchess Brittany. They were half fourth cousins. He a great grandson of King Henry I "Beauclerc" England.

[her daughter] Constance Penthièvre Viscountess Rohan was born to Alan "Black" Penthièvre 1st Earl Richmond and Bertha Canhiart I Duchess Brittany. She a great granddaughter of King Henry I "Beauclerc" England.

[her son] Odo III Count Porhoët was born to Odo II Duke Brittany and Bertha Canhiart I Duchess Brittany. He a great grandson of King Henry I "Beauclerc" England.

Geoffrey "Boterel" Penthièvre II Count Penthièvre succeeded II Count Penthièvre.

Geoffrey "Boterel" Penthièvre II Count Penthièvre and Hawise Dol Countess Penthièvre were married. She by marriage Countess Penthièvre. He the son of Stephen Penthièvre Count Tréguier and Hawise Guingamp.

[her daughter] Enougen Penthièvre Abbess Saint Sulpice was born to Alan "Black" Penthièvre 1st Earl Richmond and Bertha Canhiart I Duchess Brittany. She a great granddaughter of King Henry I "Beauclerc" England.