"Jan Hanuš Sitt, known as Hans Sitt, (21 September 1850, Prague – 10 March 1922, Leipzig), was a Bohemian-German violinist, violist, teacher, and composer. During his lifetime, he was regarded as one of the foremost teachers of violin. Most of the orchestras and conservatories of Europe and North America then sported personnel who numbered among his students."

http://en.wikipedia.org/wiki/Hans_Sitt