Jacob Ludwig Carl Grimm (4 January 1785 – 20 September 1863) was a German philologist, jurist, and mythologist. He is known as the discoverer of Grimm's law (linguistics), the co-author with his brother Wilhelm of the monumental Deutsches Wörterbuch, the author of Deutsche Mythologie and, more popularly, as one of the Brothers Grimm and the editor of Grimm's Fairy Tales.