- Oct 5 Henry von Battenberg, German son-in-law of Queen Victoria, born in Milan, Lombardy–Venetia (d. 1896)
- Oct 9 Gerard Philips, Dutch industrialist and manufacturer (Philips), born in Zaltbommel, Netherlands (d. 1942)
- Oct 9 Mihajlo "Micheal" Pupin, Serbian-American physicist and telephone pioneer, born in Idvor, Military Frontier of Austria (now Kovačica, Serbia) (d. 1935)
- Oct 15 Frank Valentine der Stucken, American-Belgian composer, born in Fredericksburg, Texas (d. 1929)
John L. Sullivan (1858-1918)
Oct 15 American boxer (first heavyweight gloved champion, de facto 1882-92; last heavyweight bare-knuckle champion), born in Roxbury, Massachusetts
Theodore Roosevelt (1858-1919)
Oct 27 26th US President (R: 1901-09; Nobel 1906), born in New York City
