Jacob Ludwig Karl Grimm, German philologist, jurist and mythologist, was born at Hanau, in Hesse-Kassel (or Hesse-Cassel). He is best known as the discoverer of Grimm's Law, the author of the monumental German Dictionary, his Deutsche Mythologie and more popularly, with his brother Wilhelm, as one of the Brothers Grimm, as the editor of Grimm's Fairy Tales.
(From Wikipedia.)