Editing 1866 (section)

=== July–September ===
[[File:H.G. Wells by Beresford.jpg|thumb|right|110px|[[H. G. Wells]]]]
[[File:Toulouse-Lautrec - Moulin Rouge - La Goulue.jpg|thumb|110px|[[La Goulue]]]]
[[File:Thomas_Hunt_Morgan.jpg|thumb|right|110px|[[Thomas Hunt Morgan]]]]
[[File:Vassily-Kandinsky.jpeg|thumb|right|110px|[[Wassily Kandinsky]]]]
* [[July 6]] – [[Charles Mangin]], French general (d. [[1925]])
* [[July 9]] – [[Macklyn Arbuckle]], American actor (d. [[1931]])
* [[July 13]] – [[La Goulue]], French dancer (d. [[1929]])
* [[July 25]] – [[Frederick Blackman]], English plant physiologist (d. 1947)
* [[July 27]] – [[António José de Almeida]], 6th President of Portugal and 64th Prime Minister of Portugal (d. [[1929]])
* [[July 28]] – [[Beatrix Potter]], English children's author (''[[Peter Rabbit]]'' and ''[[The Tale of Jemima Puddle-Duck|Jemima Puddle-Duck]]'') (d. [[1943]])
* [[August 2]] – [[Adrien de Gerlache]], Belgian naval officer and explorer (d. [[1934]])
* [[August 4]] – [[Gheorghe Mărdărescu]], Romanian general and politician (d. [[1938]])
* [[August 6]] – [[Chief Thunderbird]], Native American actor (d. [[1946]])
* [[August 8]] – [[Matthew Henson]], African-American explorer (d. [[1955]])
* [[August 12]] – [[Jacinto Benavente]], Spanish writer, [[Nobel Prize in Literature|Nobel Prize]] laureate (d. [[1954]])
* [[August 14]] – [[Dmitry Merezhkovsky]], Russian novelist, poet and religious thinker (d. [[1941]])
* [[September 1]]
:* [[James J. Corbett]], American boxer (d. [[1933]])<ref>{{cite web |title=James J. Corbett {{!}} American boxer |url=https://www.britannica.com/biography/James-J-Corbett |website=Encyclopedia Britannica |access-date=8 August 2021 |language=en}}</ref>
:* [[Thomas F. Woodlock]], editor of ''[[The Wall Street Journal]]'' and [[Interstate Commerce Commission]] commissioner (d. [[1945]])
* [[September 7]] – [[Tristan Bernard]], French writer (d. [[1947]])
* [[September 10]] – [[Jeppe Aakjær]], Danish poet and novelist (d. [[1930]])
* [[September 16]] – [[Joe Vila]], American sportswriter (d. [[1934]])
* [[September 21]]
** [[Charles Nicolle]], French bacteriologist, recipient of the [[Nobel Prize in Physiology or Medicine]] (d. [[1936]])
** [[H. G. Wells]], English writer (d. [[1946]])
* [[September 22]] – [[Witmer Stone]], American ornithologist and botanist (d. [[1939]])
* [[September 27]] – [[Eurosia Fabris]], Italian Catholic ''Blessed'' (d. [[1932]])
* [[September 25]] – [[Thomas Hunt Morgan]], American geneticist, recipient of the [[Nobel Prize in Physiology or Medicine]] (d. [[1945]])