Who is this Finnish composer and violinist of the late Romantic and early-modern periods that the Scottish music critic and composer Cecil Gray published books on?
Jean Sibelius Jean Sibelius ( ;    ), born Johan Julius Christian Sibelius (8 December 186520 September 1957), was a Finnish composer and violinist of the late Romantic and early-modern periods. He is widely recognized as his country's greatest composer and, through his music, is often credited with having helped Finland to develop a national identity during its struggle for independence from Russia.
Johann Strauss I Johann Strauss I (German: "Johann Baptist Strauß, Johann Strauss (Vater)" ; also Johann Baptist Strauss, Johann Strauss Sr., the Elder, the Father; March 14, 1804 – September 25, 1849) was an Austrian Romantic composer. He was famous for his waltzes, and he popularized them alongside Joseph Lanner, thereby setting the foundations for his sons to carry on his musical dynasty. His most famous piece is the Radetzky March (named after Joseph Radetzky von Radetz).