Marie-Antoinette Willemsen called Meyrianne Héglon (21 June 1867 – 11 January 1942) was a Belgian opera singer. After her marriage to the composer Xavier Leroux, she was known as Madame Héglon-Leroux.
She appeared in 1898 in the role of Anne Boleyn in Henry VIII at Covent Garden where she also performed on 13 July 1899 in the title role of Messaline with Albert Alvarez in the role of Helion and Maurice Renaud in that of Harès. She also sang in the main opera houses of Belgium.. At the Opéra-Comique, she created the role of La Vougne in Alexandre Georges' comic opera Miarka,[4] on 7 November 1905 and also sang in this opera's premiere in London.
After her retirement from the stage, she taught singing. Among her most notable students was the French soprano Ninon Vallin.
On 8 April 1917 her husband, Xavier Leroux, conducted his work Les cadeaux de Noël. The participating artists were all students of Héglon. On 6 April 1918 another work by her husband was performed, 1814. For this performance, she came out of retirement to sing the role of The Mother.[1]