Jakob Ludwig Karl Grimm was a renowned German author and philologist. He is mostly known for his works on linguistics and fairy tales. While there may not be many synonyms for his name, there are several other words that can be used to refer to him or his works. For instance, Jacob Grimm and the Brothers Grimm are commonly used to refer to him and his brother Wilhelm, who were famous as the Grimm Brothers or die Brüder Grimm. Additionally, the term fairy tales or Märchen can be used to refer to their collections of stories, which are still famous today. In summary, while there may not be many synonyms for Grimms' name, there are several other words that can be used to refer to him and his works.