Jan 25 William Cavendish, 1st Duke of Devonshire, English soldier and statesman (d. 1707) was born in the year 1640.
Mar 18 Philippe de la Hire, French mathematician and astronomer (d. 1719) was born in the year 1640.
Mar 30 John Trenchard, English politician (d. 1695) was born in the year 1640.
Apr 01 In the year 1640 birth of georg Mohr, Danish mathematician (d. 1697)
Apr 22 Mariana Alcoforado, Portugal, nun was born on this day in history.
May 31 Michał Wiśniowiecki, King of Poland (d. 1673) was born in the year 1640.
Jun 05 In the year 1640 birth of pu Songling, Chinese writer (d. 1715)
Jun 09 In the year 1640 birth of leopold I, Holy Roman Emperor (1658-1705)