| Alix | |
|---|---|
 Alix represented on a window in Chartres Cathedral | |
| Duchess of Brittany | |
| Reign | April 1203 – 21 October 1221 |
| Predecessor | Arthur I |
| Successor | John I |
| Co-ruler | Peter I |
| Regent | Guy of Thouars (1203–1206) Philip II of France (1206–1213) |
| Born | 1200 Brittany |
| Died | 21 October 1221 (aged 20–21) |
| Burial | 24 November 1225 |
| Spouse | |
| Issue | John I, Duke of Brittany Yolande, Countess of Penthièvre |
| House | Thouars |
| Father | Guy of Thouars |
| Mother | Constance, Duchess of Brittany |
Alix of Thouars[a] (1200 – 21 October 1221) (in Breton Alis) ruled as Duchess of Brittany from 1203 until her death. She was also Countess of Richmond in the peerage of England.[b]
- ^ a b Everard & Jones 1999, p. 169.
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