Eugène Ysaÿe (French: [øʒɛn iza.i]; 16 July 1858 – 12 May 1931) was a Belgian violinist, composer and conductor. He was regarded as "The King of the Violin", or, as Nathan Milstein put it, the "tsar".
Eugène-Auguste Ysaÿe came from a background of "artisans", though a large part of his family played instruments. As violinist Arnold Steinhardt recounts, a legend was passed down through the Ysaÿe family about the first violin brought to the lineage: