| 123901 | October 30 | Birth | 1218 – Emperor Chūkyō of Japan (d. 1234) |
| 123902 | October 30 | Birth | 1513 – Jacques Amyot, French bishop and translator (d. 1593) |
| 123903 | October 30 | Birth | 1624 – Paul Pellisson, French historian and author (d. 1693) |
| 123904 | October 30 | Birth | 1668 – Sophia Charlotte of Hanover (d. 1705) |
| 123905 | October 30 | Birth | 1735 – John Adams, American lawyer and politician, 2nd President of the United States (d. 1826) |
| 123906 | October 30 | Birth | 1748 – Martha Jefferson, American wife of Thomas Jefferson (d. 1782) |
| 123907 | October 30 | Birth | 1751 – Richard Brinsley Sheridan, Irish-English poet, playwright, and politician, Treasurer of the Navy (d. 1816) |
| 123908 | October 30 | Birth | 1762 – André Chénier, Turkish-French poet and playwright (d. 1794) |
| 123909 | October 30 | Birth | 1786 – Philippe-Joseph Aubert de Gaspé, Canadian captain and author (d. 1871) |
| 123910 | October 30 | Birth | 1799 – Ignace Bourget, Canadian bishop (d. 1885) |
| 123911 | October 30 | Birth | 1839 – Alfred Sisley, French-English painter (d. 1899) |
| 123912 | October 30 | Birth | 1857 – Georges Gilles de la Tourette, French-Swiss physician and neurologist (d. 1904) |
| 123913 | October 30 | Birth | 1861 – Antoine Bourdelle, French sculptor and painter (d. 1929) |
| 123914 | October 30 | Birth | 1871 – Buck Freeman, American baseball player (d. 1949) |
| 123915 | October 30 | Birth | 1871 – Paul Valéry, French poet and philosopher (d. 1945) |
| 123916 | October 30 | Birth | 1873 – Francisco I. Madero, Mexican businessman and politician, 33rd President of Mexico (d. 1913) |
| 123917 | October 30 | Birth | 1877 – Hugo Celmiņš, Latvian politician, Prime Minister of Latvia (d. 1941) |
| 123918 | October 30 | Birth | 1881 – Elizabeth Madox Roberts, American poet and author (d. 1941) |
| 123919 | October 30 | Birth | 1882 – Oldřich Duras, Czech chess player and composer (d. 1957) |
| 123920 | October 30 | Birth | 1882 – William Halsey, Jr., American admiral (d. 1959) |
| 123921 | October 30 | Birth | 1882 – Günther von Kluge, Polish-German field marshal (d. 1944) |
| 123922 | October 30 | Birth | 1885 – Ezra Pound, American poet and critic (d. 1972) |
| 123923 | October 30 | Birth | 1886 – Zoë Akins, American author, poet, and playwright (d. 1958) |
| 123924 | October 30 | Birth | 1887 – Sukumar Ray, Indian-Bangladeshi author, poet, and playwright (d. 1923) |
| 123925 | October 30 | Birth | 1888 – Louis Menges, American soccer player, soldier, and politician (d. 1969) |
| 123926 | October 30 | Birth | 1888 – Konstantinos Tsiklitiras, Greek footballer and high jumper (d. 1913) |
| 123927 | October 30 | Birth | 1893 – Charles Atlas, Italian-American bodybuilder (d. 1972) |
| 123928 | October 30 | Birth | 1893 – Roland Freisler, German soldier, lawyer, and judge (d. 1945) |
| 123929 | October 30 | Birth | 1894 – Jean Rostand, French biologist and philosopher (d. 1977) |
| 123930 | October 30 | Birth | 1894 – Peter Warlock, English composer and critic (d. 1930) |