- Oct 1 Cliff Friend, American pianist and songwriter, born in Cincinnati, Ohio (d. 1974)
- Oct 1 Faith Baldwin, American author (They Who Love), born in New Rochelle, New York (d. 1978)
- Oct 1 Ip Man, Chinese martial artist, and a master teacher of Wing Chun, born in Foshan, Guangdong, Qing China (d. 1972)
- Oct 2 Leroy Shield [Shields], American pianist, composer (Laurel & Hardy; Our Gang; Union Pacific Suite), and orchestra leader, born in Waseca, Minnesota (d. 1962)
- Oct 3 Bedřich Havlík, Czech composer, born in Řípec, Czech Republic (d. 1964)
- Oct 6 Earle Hodgins, American film and television fast-talking character actor (Guestward Ho!), born in Salt Lake City, Utah (d. 1964)
- Oct 8 Orovida Camille Pissarro, British painter and etcher, born in Epping, England (d. 1968)
- Oct 9 Heinrich George [Georg August Friedrich Hermann Schulz], German actor (Hitlerjunge Quex), born in Stettin, Pomerania, Germany (d. 1946)
- Oct 9 Mário de Andrade, Brazilian writer, photographer and modernist, born in São Paulo (d. 1945)
- Oct 10 August Balthazar, Belgian politician, born in Ghent, Belgium (d. 1952)
- Oct 10 Lester Lonergan Jr, American stage and screen actor (Guilty Bystander; The Growing Paynes), born in Peterson, New Jersey (d. 1959
- Oct 10 Willi Apel, German-American musicologist (Harvard Dictionary of Music), born in Konitz, West Prussia (d. 1988)
- Oct 12 Freddie Martin, West Indian cricket batsman, (9 Tests, 1 x 100; Jamaica), born in Kingston, Jamaica (d. 1967)
- Oct 12 Páll Ísólfsson, Icelandic organist and composer, born in Stokkseyri, Iceland (d. 1974)
- Oct 12 Velvalee Dickinson, American spy, convicted of espionage against the United States on behalf of Japan during World War II, born in Sacramento, California (d. 1980)
- Oct 14 Lillian Gish, American silent film and stage actress (Birth of a Nation), born in Springfield, Ohio (d. 1993)
- Oct 15 Carol II, King of Romania (1930-40), born in Peleș Castle, Sinaia, Kingdom of Romania (d. 1953)
- Oct 15 Ina Claire [Fagan], American stage and screen actress (Ninotchika), born in Washington, D.C. (d. 1985)
- Oct 17 Fritz Ascher, German Expressionist artist, born in Berlin, Germany (d. 1970)
- Oct 17 Jean Binet, Swiss composer, born in Geneva (d. 1960)
- Oct 18 Georges Ohsawa, Japanese founder of Macrobiotics (d. 1966)
- Oct 18 Roy Del Ruth, DE, director (About Face, Babe Ruth Story, Star Show)
- Oct 18 Sidney Holland, Prime Minister of New Zealand (National: 1949-57), born in Greendale, New Zealand (d. 1961)
- Oct 20 Charley Chase, American comedian, actor and director (d. 1940)
- Oct 23 Ernest Julius Öpik, Kunda, Estonian Astronomer and Astrophysicist known for his studies of meteors and the structure and evolution of the cosmos
- Oct 23 Jean Absil, Belgian organist and composer (Benedictions; Peau d'Ane), born in Bonsecours; (d. 1974)
Merian C. Cooper (1893-1973)
Oct 24 American film director and producer (King Kong) and aviator (Kościuszko Squadron, Director-Pan American Airways), born in Jacksonville, Florida
- Oct 26 Miloš Crnjanski, Serbian poet (Seobe), born in Csongrád, Austria-Hungary (d. 1977)
- Oct 27 Johan G Dancer, Dutch poet (Meetings)
- Oct 28 Christopher Kelk Ingold, English chemist (Cahn–Ingold–Prelog priority rules), born in London (d. 1970)
- Oct 28 Otto Huiswoud, Suriname-born political activist and editor-in-chief (Negro Worker), born in Paramaribo, Suriname (d. 1961)
- Oct 30 Charles Atlas [Angelo Siciliano], Italian-American bodybuilder, born in Acri, Cosenza, Italy (d. 1972)
- Oct 30 Jan Romein, Dutch historian (Low Countries at Sea), born in Rotterdam, Netherlands (d. 1962)
- Oct 30 Roland Freisler, German Nazi judge (July 20th plotter case) and politician, born in Celle, Lower Saxony, German Empire (d. 1945)