Simon de la Loubère
Simon de la Loubère was a French diplomat to Siam (Thailand), writer, mathematician and poet. He is credited with bringing back a document which introduced Europe to Indian astronomy, the "Siamese method" of making magic squares, as well as one of the earliest description of parachutes.
21 April 1642
Born on the same birth day (21 April): Angela Mortimer • Antonín Kammel • Charles Grodin • Garrett Hardin • James Dobson • Jarrett Allen • Murathan Mungan
Born in the same month (April 1642): Suleiman II of the Ottoman Empire