| Male Sir Pierre de Vreux, Duke of Brittany |
| Birth | Abt 1187 | |
| Death | 1240 | |
| Burial | ||
| Marriage | 1213 [1, 2, 3] | |
| Father | Robert II, Count of Dreux and Braine | F2644 Group Sheet | |
| Mother | Yolande de Coucy | F2644 Group Sheet | |
| Female Alix de Thouars, Duchess of Brittany, Countess of Richmond |
| Birth | 1201 | |
| Death | 1221 | |
| Burial | 24 Nov 1225 | Abbey of Villeneuve, Les Sorinières, Pays de la Loire, France |
| Father | Gui de Thouars, Duke of Brittany | F2645 Group Sheet | |
| Mother | Constance, Duchess of Brittany | F2645 Group Sheet | |
| Female + Yolande de Dreux |
| Birth | ||
| Death | 1255 | |
| Burial | ||
| Spouse | Hugh IV, Duke of Burgundy | F2544 | |
| Marriage | ||
| Spouse | Hugh XI de Lusignan, Count of Ponthieu, la Marche and Angoulême | F2545 | |
| Marriage | ||
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Sources 🟢 Primary Evidence 🟡 Secondary Evidence 🟠 Tertiary Evidence 🔴 Unreliable Evidence |
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