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Yvonne Madeleine Aaron was a French composer and pianist. She also composed under the pseudonyms Yve or Yves Nohar. Until the death of her sister Marcelle Aaron, they published works together under the name M et Y Aaron.
Yvonne was admitted to the Paris Conservatoire on 17 December 1917. In the 1920s, she began publishing compositions together with her sister, initially works for voice with piano or organ accompaniment. In the 1930s, the two also composed works for orchestra, which were performed in the Parisian concert series Concerts Lamoureux and Concerts Pasdeloup and also broadcast on the radio. For example, on April 2, 1932, the orchestral version of Écoute Israël [Hear, O Israel] was performed with the singer Wilhelmine Coudray under the direction of Rhené-Baton .