- Sep 1 Kazimierz Wilkomirski, Polish cellist, composer, conductor, administrator, and educator, born in Moscow, Russian Empire (d. 1995)
- Sep 12 Eric Harding Thiman, English composer, born in Ashford, Kent (d. 1975)
- Sep 19 Solomon Pimsleur, French composer, born in Parigi, France (d. 1962)
- Sep 20 Uuno Klami, Finnish composer (Psalmus; Kalevala Suite), born in Virolahti, Finland (d. 1961)
- Sep 20 Wilhelm Weismann, German composer, born in Alfdorf, Germany (d. 1980)
About September 1900
How Old? 123 years old
Generation: Lost Generation
Leap Year: No
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