Arnold Josef Rosé (born Rosenblum; 24 October 1863 – 25 August 1946) was a Romanian-born Austrian Jewish violinist. He was leader of the Vienna Philharmonic Orchestra for over half a century. He worked closely with Brahms. Gustav Mahler was his brother-in-law. Although not known internationally as a soloist he was a great orchestral leader (concertmaster) and player of chamber music, leading the famous Rosé Quartet for several decades.