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 In the year 1640 birth of john Trenchard, English politician (d. 1695)
Apr 01 Georg Mohr, Danish mathematician (d. 1697) was born on this day in history.
Apr 22 Mariana Alcoforado, Portugal, nun was born on this day in history.
May 31 On this day in history birth of michał Wiśniowiecki, King of Poland (d. 1673)
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)