Olivier Greif (3 January 1950, Paris – 13 May 2000, Paris) was a French composer of Polish-Jewish parentage. His father was an Auschwitz survivor, a fact which affected Greif deeply and led him to compose a number of Holocaust-themed works, notably Todesfuge, and Lettres de Westerbork, a song cycle which uses letters written by Etty Hillesum . (The composer wanted to use Paul Celan's poem "Todesfuge" in his third string quartet, but found it difficult to set, so kept the title but used Dylan Thomas's "Elegy" instead.)