Editing 1640 (section)

=== April&ndash;June ===
* [[April 1]]
** [[Sigismund Casimir]], Crown Prince of Poland (d. [[1647]])
** [[Georg Mohr]], Danish mathematician (d. [[1697]])
* [[April 4]] &ndash; [[Gaspar Sanz]], Spanish composer, musician, priest (d. [[1710]])
* [[April 6]] &ndash; [[Thomas Lloyd (lieutenant governor)|Thomas Lloyd]], Quaker preacher of provincial Pennsylvania (d. [[1694]])
* [[April 7]] &ndash; [[Ludmilla Elisabeth of Schwarzburg-Rudolstadt]], German Countess and hymn poet (d. [[1672]])
* [[April 18]] &ndash; [[Étienne Chauvin]], French Protestant divine (d. [[1725]])
* [[April 22]] &ndash; [[Mariana Alcoforado]], Portuguese nun (d. [[1723]])
* [[April 23]] &ndash; [[Wolfgang William Romer]], Dutch military engineer (d. [[1713]])
* [[April 26]] &ndash; [[Frederick, Count of Nassau-Weilburg]], ruling Count of Nassau-Weilburg  (1655-1675) (d. [[1675]])
* [[April 30]] &ndash; [[Nicolas Letourneux]], French preacher, ascetical writer (d. [[1686]])
* [[May 31]] &ndash; [[Michał Korybut Wiśniowiecki]], King of Poland (d. [[1673]])
* [[June 5]] &ndash; [[Pu Songling]], Qing Dynasty Chinese writer (d. [[1715]])
* [[June 9]] &ndash; [[Leopold I, Holy Roman Emperor]] (d. [[1705]])
* [[June 15]] &ndash; [[Bernard Lamy]], French Oratorian mathematician and theologian (d. [[1715]])
* [[June 16]] &ndash; [[Jacques Ozanam]], French mathematician (d. [[1718]])
* [[June 19]] &ndash; [[Thomas Widdrington (died 1660)|Thomas Widdrington]], English politician (d. [[1660]])
* [[June 21]] &ndash; [[Abraham Mignon]], Dutch golden age painter (d. [[1679]])
* [[June 29]] &ndash; [[Elizabeth Stanhope, Countess of Chesterfield]], second wife of Philip Stanhope (d. [[1665]])<ref>{{cite book | last = MacLeod | first = Catharine | title = Painted ladies : women at the court of Charles II | publisher = National Portrait Gallery | location = London | year = 2001 | isbn = 9781855143210 }}</ref>