Alice of Brittany, Countess of Blois

Alix of Brittany (6 June 1243 – 2 August 1288), dame de Pontarcy in her own right, was the eldest daughter of John I, duke of Brittany, and Blanche of Navarre. She married John I of Châtillon, count of Blois, bringing Pontarcy and Brie-Comte-Robert as her dowry; their daughter was Joan, later countess of Blois.

With her husband she founded La Guiche Abbey near Blois in 1277. Widowed in 1279, she travelled to the Holy Land in 1287 and built two towers at Acre, dying in 1288.