John Hadley

John Hadley was an English mathematician, and laid claim to the invention of the octant, two years after Thomas Godfrey claimed the same.

16 April 1682

Born on the same birth day (16 April): Epke Zonderland • Johnnie Lewis • Jules Hardouin-Mansart • Kim Kyung-jung • Night Train Lane • Patrik Järbyn • Pedro Ramírez Vázquez • Rafael Benítez • Rüdiger Stenzel

Born in the same month (April 1682): Valentin Rathgeber