* Herbert Austin ( 1866 – 1941 ), British founder of the Austin Motor Company

* 1866 – The Grand Army of the Republic, an American patriotic organization composed of Union veterans of the American Civil War, is founded.

* 1866 – Felix-Raymond-Marie Rouleau, Canadian cardinal of the Roman Catholic Church ( d. 1931 )

* 1866 – Princess Viktoria of Prussia ( d. 1929 )

* 1866 – Allen Lard, American golfer ( death date unknown )

* 1866 – Giovanni Agnelli, Italian businessman, founded Fiat S. p. A ( d. 1945 )

* 1866 – Matthew Henson, American explorer ( d. 1955 )

* 1866 – José de Diego, Puerto Rican statesman and journalist ( d. 1918 )

* 1866 – Charles Jean de la Vallée-Poussin, Belgian mathematician ( d. 1962 )

* 1866 – Italo Santelli, Italian fencer ( d. 1945 )

* 1866 – Jacinto Benavente, Spanish writer, Nobel Prize laureate ( d. 1954 )

* 1866 – Henrik Sillem, Dutch sports shooter ( d. 1907 )

* Alexander John Cuza, prince of Romania ( 1859 – 1866 )

* 1866 – Austro-Prussian War ends with the Treaty of Prague.

* 1866 – Anne Sullivan, American teacher, instructor and companion of Helen Keller ( d. 1936 )

* 1866 – Ernest Starling, British physiologist ( d. 1927 )

* 1866 – Italy and Prussia ally against the Austrian Empire.

* 1866 – The American Society for the Prevention of Cruelty to Animals ( ASPCA ) is founded in New York City by Henry Bergh.

He married fourthly at the Dolmabahçe Palace, Constantinople, on 21 September 1866 to Georgian HH Hayranidil Kadın Efendi ( Kars, 2 November 1846 – Ortaköy Palace, Constantinople, 26 November 1898 ), and had two children.

The Earl of Derby, Prime Minister 1852, 1858 – 59, 1866 – 68

Charles Erdman ( 1866 – 1960 ) advocated apostolic authorship and wrote that only the Apostle John fits the image of the author derived from the text.

#** Marie Laetitia Eugénie Catherine Adélaïde Bonaparte ( 1866 – 1926 )

Le déjeuner sur l ' herbe, ( right section ), with Gustave Courbet, 1865 – 1866, Musée d ' Orsay, Paris, France | Paris

Furthermore, Davis accused Gould of having misrepresented a study by Henry H. Goddard ( 1866 – 1957 ) about the intelligence of Jewish, Hungarian, Italian, and Russian immigrants to the U. S., wherein Gould reported Goddard's qualifying those people as " feeble-minded "; whereas, in the initial sentence of the study, Goddard said the study subjects were atypical members of their ethnic groups, who had been selected because of their suspected sub-normal intelligence.

Hungarian Jews of the Karlin Hasidic court settled in another part of the city in 1866.

Born in 1866, Bloom is the only son of Rudolf Virág ( a Hungarian Jew from Szombathely who emigrated to Ireland, converted from Judaism to Protestantism, changed his name to Rudolph Bloom and later committed suicide ), and of Ellen Higgins, an Irish Protestant.

* Translations from Hungarian poet Alexander Petofi ( 1866 )

During the reign of Austro-Hungarian Empire in ( 1866 ), Austrian and Hungarian royalty and aristocracy started visiting local resorts and discovered Poreč.

* Ferenc Pulszky, a Hungarian politician, who joined Kossuth on his tour of the United States and England, became involved in Italian revolutionary activities and was imprisoned, and then was pardoned and returned home in 1866

In 1866, he was elected president of the Hungarian academy.

This opinion goes back as far as 1866, to Károly Szabó ( 1824 – 1890 ), Hungarian historian.

After the war of 1866 ( in which as a Prussian major-general he organized a Hungarian corps in Silesia ) Klapka was permitted by the Austrian government to return to his native country, and in 1867 was elected a member of the Hungarian Chamber of Deputies, in which he belonged to the Deák party.

Franz Tangl ( Budapest, January 26, 1866 – Budapest, December 19, 1917 ) was a Hungarian physiologist and pathologist, member of the Hungarian Academy of Sciences.

Ludwig August Ritter von Benedek ( 14 July 1804 – 27 April 1881 ), also known as Lajos Benedek, was an Austrian general ( Feldzeugmeister ) of Hungarian descent, best known for commanding the imperial army in 1866 in the Battle of Königgrätz against the Prussian Army.

* 1866 – António José de Almeida, Portuguese politician, 6th President of Portugal ( d. 1929 )

* 1866 – William G. Conley, American politician and 18th Governor of West Virginia ( d. 1940 )

* 1802 – Solomon Foot, American politician ( d. 1866 )

* 1866 – Sun Yat-sen, Chinese revolutionary and politician ( d. 1925 )

* 1789 – William Burton, American politician ( d. 1866 )

* 1866 – Georg Voigt, German politician ( d. 1927 )

* 1800 – Daniel S. Dickinson, American politician ( d. 1866 )

* 1866 – Freeman Freeman-Thomas, 1st Marquess of Willingdon, English politician, 13th Governor General of Canada ( d. 1941 )

* March 7 – Jaan Poska, Estonian barrister and politician ( b. 1866 )

* November 19 – Solomon Foot, American politician ( d. 1866 )

* Charles Murray, Lord Murray ( 1866 – 1936 ), Scottish Tory politician, lawyer and judge

* Robert Livingston Beeckman ( 1866 – 1935 ), American politician and Governor of Rhode Island

** George Huntington ( Steuben County, NY ) ( 1796 – 1866 ), New York politician

* Alpheus Sherman ( 1780 – 1866 ), New York politician

* Charles Humbert ( 1866 – 1927 ), French politician and newspaper proprietor, father of Agnès Humbert

* George Harold Smith ( 1866 – 1936 ), New Zealand politician

Domhnall Ua Buachalla (; 5 February 1866 – 30 October 1963 ) was an Irish politician, shopkeeper and member of the First Dáil who served as third and final Governor-General of the Irish Free State and later served as a member of the Council of State.

* Clarence W. Turner ( 1866 – 1939 ), American politician

* Nina Bang ( 1866 – 1928 ), Danish politician

He was a Conservative politician and served under the Earl of Derby and Benjamin Disraeli as Under-Secretary of State for War from 1866 to 1868.

* Billy J. Clark ( 1778 – 1866 ), New York physician and politician

* Jonathan Temple ( 1796 – 1866 ), Los Angeles, California, landowner, cattle rancher and politician, born in Reading

Lewis Cass ( October 9, 1782June 17, 1866 ) was an American military officer and politician.

During the reign of Domnitor Alexandru Ioan Cuza ( 1859 – 1866 ), Catargiu was one of the Opposition leaders, and received much assistance from his kinsman, Barbu Catargiu ( b. 1807 ), a noted journalist and politician, who was assassinated in Bucharest on the June 20, 1862.