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): Anya Taylor-Joy • Cameron Blades • Dusty Springfield • Ford Madox Brown • John Hodiak • Kim Kyung-jung • Mirai Nagasu • Octave Crémazie • Polly Adler • Roy Hamilton • Spike Milligan • Taye Taiwo • Tracy K. Smith

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