- Sep 2 Ernst Curtius, German archaeologist/historian
- Sep 6 George Cartier, Canadian co-PM (1858-62), born in Saint-Antoine-sur-Richelieu, Quebec, Canada (d. 1873)
- Sep 8 Charles-Étienne Brasseur de Bourbourg, French writer and historian, born in Bourbourg, France (d. 1874)
- Sep 13 Nicolas Beets [Hildebrand], Dutch writer (Camera Obscura) and theologian, born in Haarlem, Netherlands (d. 1903)
- Sep 17 Stefano Ronchetti-Monteviti, Italian composer (Pergolese), and educator (Milan Conservatory, 1850-81), born in Asti, Piedmont, Italy (d. 1882)