Editing 1866 (section)

=== April–June ===
[[File:Butch Cassidy with bowler hat.jpg|thumb|110px|[[Butch Cassidy]]]]
[[File:AnneSullivanMacy.jpg|thumb|110px|[[Anne Sullivan]]]]
* [[April 1]] – [[Ferruccio Busoni]], Italian pianist and composer (d. [[1924]])
* [[April 3]] – [[J. B. M. Hertzog]], Boer General and 3rd Prime Minister of South Africa (d. [[1942]])
* [[April 8]] – [[Alfred Allen (actor)|Alfred Allen]], American actor (d. [[1947]])
* [[April 13]] – [[Butch Cassidy]], American outlaw (k. [[1908]])
* [[April 14]] – [[Anne Sullivan]], American tutor of [[Helen Keller]] (d. [[1936]])
* [[April 17]] – [[Ernest Starling]], English physiologist (d. [[1927]])
* [[April 18]] – [[Yamaya Tanin]], Japanese admiral (d. [[1940]])
* [[April 21]] – [[Josefa Toledo de Aguerri]], Nicaraguan pioneer educator (d. [[1962]])
* [[April 22]] – [[Hans von Seeckt]], German general (d. [[1936]])
* [[April 24]] – [[Ishii Kikujirō]], Japanese diplomat (d. [[1945]])
* [[May 10]] – [[Richard H. Jackson]], American four-star admiral (d. [[1971]])
* [[May 17]] – [[Erik Satie]], French composer (d. [[1925]])
* [[May 22]] – [[Charles F. Haanel]], American [[New Thought]] author and businessman (d. [[1949]])
* [[June 4]] – [[Miina Sillanpää]], Finnish politician (d. [[1952]])
* [[June 26]] 
** [[George Herbert, 5th Earl of Carnarvon]], English financier of Egyptian excavations (d. [[1923]])
** [[Josef Swickard]], German actor (d. [[1940]])