Wikipedia:
Adolf "Dol" Dauber (* July 27, 1894 in Wiznitz near Czernowitz/Bukowina; † September 15, 1950 in Prague) was a violinist, bandmaster and composer.
In the 1920s Adolf Dauber adopted the stage name Dol Dauber and in 1926 founded the "Jazz Symphony and Dance Orchestra" in Vienna, which soon became one of the best in the city and by 1932 had recorded and published numerous pieces, some composed by Dauber himself, with the British Gramophone Company. Of his compositions, the hit song Leila with lyrics by Fritz Löhner-Beda became the most famous.
In 1933 he moved with his musicians to Prague, where he played concerts and made further recordings, among others with R. A. Dvorsky. During the German occupation of Prague and World War II, he and his wife managed to avoid deportation themselves, but saw their son, cellist and composer Robert Dauber, imprisoned in the Theresienstadt concentration camp in 1943. During a visit to Prague, Hitler insisted that Dauber play in his presence. Dauber's retort that he would play only if his son was released was rebuffed. After the war, Dauber fell into depression over his son's death in Dachau concentration camp and died in Prague in 1950.
Note: Translated from a German version of Wikipedia into English.