Jędrzej Śniadecki, Polish physician, chemist, and biologist (d. 1838)
Jędrzej Śniadecki (archaic Andrew Sniadecki; Lithuanian: Andrius Sniadeckis; 30 November 1768 – 11 May 1838) was a Polish writer, physician, chemist, biologist and philosopher. His achievements include being the first person who linked rickets to lack of sunlight. He also created modern Polish terminology in the field of chemistry.