Karl von Frisch was born on November 20, 1886.
Karl von Kügelgen was born on February 6, 1772.
Karl Ernst von Baer was born on February 17, 1792.
Karl Josef von Hefele was born on March 15, 1809.
Karl Freiherr von Müffling was born on June 12, 1775.
Karl Wilhelm von Nägeli was born on March 27, 1817.
Karl Alfred von Zittel was born on September 25, 1839.
Wilhelm Karl Ritter von Haidinger was born on February 5, 1795.
Karl Theodor Ernst von Siebold was born on February 16, 1804.
Karl Robert Eduard von Hartmann was born on February 23, 1842.
Karl Eduard Zachariae von Lingenthal was born on December 24, 1812.
Karl Friedrich Hieronymus Freiherr von Münchhausen was born on May 11, 1720.
Karl Von Cosel went by Dr. Karl Von Cosel, and Count Von Cosel.