Tadeáš Hájek
Tadeáš Hájek z Hájku, also known as Tadeáš Hájek of Hájek, Thaddaeus Hagecius ab Hayek or Thaddeus Nemicus, was a Czech naturalist, personal physician of the Holy Roman Emperor Rudolph II and an astronomer in the Kingdom of Bohemia.
1 December 1525
Born on the same birth day (1 December): Christos Kalantzis • Hasan ibn Ali • Jonathan Coulton • Sola Sierra • Tomasz Adamek
Born in the same month (December 1525): John Albert I