- Sep 1 Carl Auer von Welsbach, Austrian scientist and inventor of the gas mantle and metal filament light bulb, born in Vienna, Austria (d. 1929) [1]
- Sep 9 Benjamin Kidd, English sociologist (Social Evolution), born in County Clare, Ireland (d. 1916)
- Sep 12 Fernand Khnopff, Belgian painter and sculptor, born in Grembergen, Dendermonde, Belgium (d. 1921)
- Sep 13 Catherinus Elling, Norwegian organist, composer, educator, and ethnomusicologist, born in Christiania (now Oslo), Norway (d. 1942)
- Sep 15 Charles Eugène, vicomte de Foucauld, French explorer and a hermit, born in Strasbourg, French Empire (d. 1916)
- Sep 15 Jenő Hubay [Huber], Hungarian violinist, composer, and educator (Budapest Conservatory, 1886-1934), born in Pest, Hungary (d. 1937)
Bonar Law (1858-1923)
Sep 16 British Prime Minister (Conservative: 1922-23), born in Kingston, Colony of New Brunswick (now Canada)
- Sep 24 Eugene Foss, American politician (45th Governor of Massachusetts), born in St. Albans, Vermont (d. 1939)
- Sep 27 Þorsteinn Erlingsson, Icelandic poet (Pyrnar), born in Iceland (d. 1914)
- Sep 29 Leopoldo Mugnone, Italian opera composer and conductor, born in Naples, Kingdom of the Two Sicilie (d. 1941)