Marie-Madeleine Gabrielle Adélaïde de Rochechouart de Mortemart was a French nun from the House of Rochechouart. The abbess of Fontevraud Abbey, she was an influential figure in the 17th century French intellectual community. She was the daughter of Gabriel de Rochechouart, duc de Mortemart, and thus sister to Madame de Montespan.

The House of Rochechouart is the oldest noble family in France. This powerful dynasty of the Carolingian era dates back to Foucher, supporter of Charles the Bald, who became viscount (vicomte) of Limoges in 876. His descendants—Limoges, Rochechouart, Mortemart and Brosse—ruled over the area for several centuries, providing many different French regimes with politicians, soldiers, functionaries and other notable figures. The family is named after the town of Rochechouart.