Background
Alix was born on or shortly before 5 September 1201. She was the daughter of Constance, Duchess of Brittany and Guy of Thouars.
Alix was born on or shortly before 5 September 1201. She was the daughter of Constance, Duchess of Brittany and Guy of Thouars.
Upon the death of Richard I of England, a power struggle commenced between her half-brother Arthur and John, King of England. At the Battle of Mirebeau in 1202, Arthur and Eleanor were captured. Arthur was imprisoned at the Château de Falaise and in 1203 disappeared.
Eleanor was imprisoned at Corfe Castle.
The Breton barons recognized Alix as Duchess of Brittany after the death of Arthur, instead of Eleanor. This was due to fears that John might claim to rule Brittany as regent for the imprisoned Eleanor.
Alix"s father Guy became regent for Alix until 1206, when Philip II of France made himself the regent of the duchy in Alix’s name. Pierre married Alix on 27 January 1213, and paid homage to the French king for Brittany.
Alix died in childbirth, without having exercised much control over her own inheritance.