She was the elder daughter and the second of three children of Charles Martel of Anjou and Klementia of Habsburg.
Beatrice was thus maternal granddaughter of Rudolf I of Germany and sister of Charles I of Hungary and Clementia of Hungary.
[1] The couple had two sons: When her husband died in 1319, Beatrice became a nun at Cîteaux.
She remained here until 1340, when she transferred to the Saint-Just-de-Claix Abbey [fr].
Her son founded for her the convent of Saint-Just dans le Royannais.