Johannes Zumpe
Johannes (Johann Christoph) Zumpe (pronounced zumpy; born, 14 June 1726, Fürth, Free Imperial City of Nuremberg, modern Germany, buried 05 Dec 1790, London, UK) was a leading maker of early English square pianos, a form of rectangular piano with a compass of about five octaves. The pianos sounded like mellow harpsichords, and had a damper stop in the left cheek of the case.