About Mary, Countess of Blois
Lived 1203 – 1241 (aged 37–38). Mary, Countess of Blois was a French aristocrat.
Mary, Countess of Blois, also known as 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, Mary married Hugh I of Châtillon, a count from Châtillon-sur-Marne, son of Gaucher III of Châtillon and Elisabeth of Saint-Pol. They had five children: John I (died 1280), Count of Blois Guy II (died 1289), Count of Saint Pol Gaucher (died 1261), lord of Crécy and Crèvecœur Hugh (died 1255) Basile (died 1280), became Abbess of Notre Dame du Val in 1248.
Her eldest son, John, succeeded her in Blois.
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Important facts
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Frequently asked questions
Who was Mary, Countess of Blois?
Countess suo jure of Blois
When was Mary, Countess of Blois born?
Mary, Countess of Blois was born in 1203.
When did Mary, Countess of Blois die?
Mary, Countess of Blois died in 1241.
What was Mary, Countess of Blois's occupation?
Mary, Countess of Blois was an aristocrat.
What nationality was Mary, Countess of Blois?
Mary, Countess of Blois was French.
Sources & further reading
· Wikipedia: Mary, Countess of Blois
· DBpedia: Mary, Countess of Blois
Cite this page
APA: Biography.guide. (2026). Mary, Countess of Blois. https://biography.guide/mary-countess-of-blois/
MLA: "Mary, Countess of Blois." Biography.guide, https://biography.guide/mary-countess-of-blois/.
Chicago: "Mary, Countess of Blois." Biography.guide. https://biography.guide/mary-countess-of-blois/.
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