Karl Wilhelm Julius Hugo Riemann was a German musicologist. He is sometimes referred to simply as "Riemann" in material on music theory and musicology, but should not be confused with the mathematician Bernhard Riemann, who is more commonly known by that name in other contexts. Riemann was born at Grossmehlra, near Sondershausen. He was educated in law and other subjects at Berlin and Tübingen. Wikipedia
The definitive Wikipedia entry for Hugo Riemann. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Hugo_Riemann