Maria Teresa Felicitas d'Este was a Princess of Modena by birth and Duchess of Penthièvre by marriage. She was the mother-in-law of Philippe Égalité and thus grandmother to the future Louis-Philippe of France. Wikipedia
Born: October 6, 1726, Palazzo Ducale di Modena, Modena, Italy
Died: April 30, 1754 (age 27 years), Château de Rambouillet, Rambouillet, France
Grandchildren: Louis Philippe I, Adélaïde d'Orléans, Antoine Philippe, Duke of Montpensier, and more
Spouse: Louis Jean Marie de Bourbon, Duke of Penthièvre (m. 1744–1754)
Parents: Charlotte Aglaé d'Orléans and Francesco III d'Este
Great grandchildren: Louise of Orléans, Ferdinand Philippe, Duke of Orléans, Henri d'Orléans, Duke of Aumale, and more