Glikl bat Yehudah Leib (Yiddish: גליקל בת ר' יהודה לייב האַמיל; also spelled Glückel or Glüeckel of Hameln; c. 1646 – September 19, 1724), born in Hamburg, was a German Jewish businesswoman and diarist. Written in her native tongue of Western (Old) Yiddish over the course of thirty years, her memoirs were originally intended to be an ethical will for her children and future descendants. Glikl's diaries are the only known pre-modern Yiddish memoirs written by a woman. Her memoirs provide an intimate portrait of German-Jewish life between the late seventeenth and early eighteenth centuries and have become an important source for historians, philologists, sociologists, literary critics, and linguists. She is often identified with the city of her husband's origin, Hameln (also Hamelin or Hamlyn).