Baron Omar Rolf von Ehrenfels
Baron Omar Rolf von Ehrenfels (born 28 April 1901 in Prague - died 7 February 1980 in Neckargemünd, Heidelberg, Germany) was a prominent Muslim of Austrian origin.
Johann Georg Stauffer
Christian Frederick Martin, was born in 1796 in Markneukirchen, Germany, a centre for instrument making. Martin first studied with his father, Johann Georg Martin, a cabinet maker. At 15 years of age, he went to Vienna for an apprenticeship with Stauffer, and in 1825, Martin married Ottilie Kühle, the daughter the Viennese harp maker Karl Kühle.