She was the daughter of Barral of Baux and his wife, Sibylle d'Anduze.

[1] They had 4 children: A year before her husband died, he wrote a will which specified that his brother, Thomas and Cecile would act as regents for Boniface, the heir to the County of Savoy.

[2] When Thomas died in 1259, Cecile continued as regent in Savoy.

In this role, one of her first acts was to relieve St-Germain-sur-Séez from various taxes in exchange for their work to guide travelers through the pass of Petit-St-Bernard.

[3] Under her regency, Boniface's uncles, Peter II and Philip I continued their practice of acquiring territories and influence in surrounding regions in the name of the count.