Marie-Madeleine de Vignerot de Pontcourlay, suo jure Duchess of Aiguillon (French pronunciation: [maʁi madlɛn də viɲʁo də pɔ̃kuʁlɛ]; 1604 – 17 April 1675) was a French aristocrat, also remembered for her charitable work and her patronage of artists and mathematicians.