Gabrielle Émilie (le Tonnelier de Breteuil) du Châtelet (1706 - 1749)

Gabrielle Émilie Le Tonnelier de Breteuil was born 17 December 1706 in Paris, Kingdom of France. She was a daughter of Louis Nicolas le Tonnelier de Breteuil and Gabrielle Anne de Froullay, Baronne de Breteuil.

On 12 June 1725, she married the Marquis Florent-Claude du Chastellet-Lomont. Her marriage conferred the title of Marquise du Chastellet. Like many marriages among the nobility, theirs was arranged. They had three children: Françoise Gabriel Pauline, Louis Marie Florent, and Victor-Esprit. Victor-Esprit died as an infant in late summer 1734.

In May 1748, Du Châtelet began an affair with the poet Jean François de Saint-Lambert and became pregnant. In a letter to a friend she confided her fears that she would not survive her pregnancy. On the night of 4 September 1749 she gave birth to a daughter, Stanislas-Adélaïde. Du Châtelet died on 10 September 1749, at Lunéville, from a pulmonary embolism. Her daughter died 20 months later.

Sources

• https://en.wikipedia.org/wiki/%C3%89milie_du_Ch%C3%A2telet