Background
Bertha was the eldest daughter of Conan III of Brittany by Maude, the illegitimate daughter of King Henry I of England. Bertha was the daughter of Duke Conan III of Brittany.
Bertha was the eldest daughter of Conan III of Brittany by Maude, the illegitimate daughter of King Henry I of England. Bertha was the daughter of Duke Conan III of Brittany.
Alan would eventually become Earl of Richmond. When her father Duke Conan III died, on his deathbed Conan III renounced Bertha"s brother Hoèl as heir, and designated Bertha as his heiress. On Conan III"s death she became hereditary Duchess of Brittany.
Constance of Brittany, who married Alan III, Vicomte of Rohan.
Enougen, abbess of Saint Sulpice. Bertha and Odo had three children:
Geoffroy de Porhoët.
Adelaide de Porhoët. (died in 1220). Abbess of Fontevrault.
Alix de Porhoët. Mistress of Henry II, King of England.
She was the last member of the Breton House of Cornouaille to reign over Brittany.