Claire Dux

Claire Dux , was an operatic and concert soprano with a successful career in continental Europe, England, and the United States.

Clara Auguste Dux was born in the village Witkowo in the county of Gnesen that area was part of the Kingdom of Prussias Province of Posen from 1815 until 1920. Alan Blyth calls her Polish, other sources call her German, The New York Times called her Swiss in 1920. Both of her parents were musical, her mother was related to Clara Schumann. At the age of 12, Dux sang Gretel in a school production of Humperdincks Hnsel und Gretel.

Source: Wikipedia