Mary, Countess of Blois
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Marie of Avesnes (1200–1241), was countess of Blois from 1230 to 1241.
She was the daughter of Walter of Avesnes and Margaret of Blois.
In 1226, Marie married Hugh I of Châtillon (sur Marne), son of Gaucher II of Châtillon and Elisabeth de Saint Pol. They had five children:
- John (d. 1280), Count of Blois
- Guy (d. 1289), Count of Saint Pol
- Gaucher (d. 1261), lord of Crécy and Crevecoeur
- Hugh (d. 1255)
- Basile (d. 1280), became Abbess of Notre Dame du Val in 1248.
Her eldest son John, succeeded her in Blois.
| Preceded by Margaret |
Countess of Blois with Hugh I 1225–1241 |
Succeeded by John I |
