- Sep 8 Marie Thérèse Louise of Savoy, Princesse de Lamballe, French aristocrat, born in Palazzo Carignano, Turin, Savoy (d. 1792)
- Sep 8 Yolande de Polastron, Duchess de Polignac, French aristocrat, favorite of Marie Antoinette at Versailles, born in Paris (d. 1793)
Jean Baptiste Joseph Delambre (1749-1822)
Sep 19 French mathematician and astronomer (The History of Astronomy), born in Amiens, France
