Wilhelm Friedrich Ernst Bach (1759–1845) was a German composer and musician, known for being a member of the famous Bach family. He was the son of Johann Christoph Friedrich Bach, who was a composer and musician himself. Wilhelm's work primarily focused on keyboard music, and he contributed to the development of the piano repertoire during his time. Although not as widely recognized as his more famous relatives, Wilhelm's compositions reflect the transition from the Baroque style to the Classical era. His music often features lyrical melodies and clear structures, showcasing the evolving tastes of the late 18th century.