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Birth:          1200 
Death:          21 Oct 1221 

Notes
https://en.wikipedia.org/wiki/Alix,_Duchess_of_Brittany
Alix of Thouars[a] (1200 – 21 October 1221) (in Breton Alis) was hereditary Duchess of 
Brittany and 5th Countess of Richmond[b] from 1203 to her death.[1][2]
Life[edit]

Alix was born in 1200. She was the daughter of Constance, Duchess of Brittany and 
Guy of Thouars.[3] According to several French historians, Constance died after 
giving birth to Alix's sisters Catherine and Margaret.[4][5][6][7][8][9][10] Alix's older 
half-brother was Arthur I, Duke of Brittany and her half-sister was Eleanor, Fair Maid of 
Brittany, the children of Constance and Geoffrey Plantagenet. 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. King 
Philip II broke off the betrothal of Alix and the Breton prince Henry of Penthièvre, [c] 
and turned to his French cousin Peter of Dreux, as Alix's husband.[11][12] Pierre 
married Alix on 27 January 1213, and paid homage to the French king for Brittany.

In 1218 Pierre and Alix were recognized by William Marshal, 1st Earl of Pembroke 
regent of England as Earl and Countess of Richmond in place of Eleanor, who would 
never be released from imprisonment.

Alix died on 21 October 1221, without having exercised much control over her own 
inheritance. She was succeeded in the duchy by her son John I, but Peter remained 
the de facto ruler of Brittany as John I's regent until 1237.

Children[edit]
1.John I, Duke of Brittany (ca. 1217-1286)[13]
2.Yolande of Brittany, (1218 - 1272), married Hugh XI of Lusignan, Count of 
Angoulême and Count of Marche
3.Arthur of Brittany (1220–1224), betrothed to Jeanne de Craon, daughter of Amaury I 
de Craon and Jeanne des Roches

Parents
DE THOUARS Guy (ABT 1160 - 13 Apr 1213)
OF BRITTANY Constance (1161 - ABT 5 Sep 1201)

Siblings
____ Alix (1200 - 21 Oct 1221)

Marriage To DE DREUX Pierre (ABT 1187 - 26 May 1250)
    m. 27 Jan 1213 

Notes

Parents
____ Robert II (ABT 1154 - 28 Dec 1218)
DE COUCY Yolande (ABT 1164 - 18 Mar 1222)

Children by DE DREUX Pierre ABT 1187 - 26 May 1250
OF BRITTANY Yolande (1218 - 10 Oct 1272)

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