Adele de Batz de Trenquelleon is a French nun born in Feugarolles on June 10, 1789 and died in Agen on January 10, 1828.

In 1804, she founded a Christian association, La Petite Société, affiliated in 1808 with the Congregation of the Immaculate, a lay movement founded by Father Chaminade in 1801 in Bordeaux.

At Agen on May 25, 1816, she founded the Institute of the Daughters of Mary, who was later to be designated as Daughters of Mary Immaculate and, commonly, as Marianist Sisters. It takes in religion the name of Mother Mary of the Conception.

The founder is buried in the cemetery of the Convent of the Daughters of Mary in Agen.