Clémence de Grandval (21 January 1828 – 15 January 1907), born as Marie Félicie Clémence de Reiset and also known as Vicomtesse de Grandval and Marie Grandval, was a French composer of the Romantic era. She was a person and composer of stature during her life, although less remembered subsequently. Many of her works were published under pseudonyms.
Marie Félicie Clémence de Reiset was the youngest of four children, born in 1828 into a well-to-do family in the Chateau de la Cour du Bois at Saint-Rémy-des-Monts. Her father was an Officier de la Légion d'honneur and a talented pianist, while her mother wrote and published stories. Her parents received many composers and artists, including Jean-Baptiste-Philémon de Cuvillon, Auguste-Joseph Franchomme, Louis-Nicolas Cary and Paul Scudo.
At a very young age, she received composition lessons from composer and family friend Friedrich Flotow, and later studied with Frédéric Chopin. Because her family was wealthy, she was able to work as a composer without financial concerns. She married the Vicomte de Grandval and they had two daughters, Isabelle and Thérèse. She subsequently studied for two years with Camille Saint-Saëns (he dedicated his Oratorio de Noel to her), and continued to work as a composer after her marriage. However, her social position led her to publish several of her works under pseudonyms. These included Caroline Blangy, Clémence Valgrand, Maria Felicita de Reiset and Maria Reiset de Tesier.
Grandval was the recipient of the inaugural Prix Rossini, winning in 1881 with her librettist Paul Collin. Her earliest works were sacred and performed in churches, but she went on to write a number of operas and various popular songs and instrumental works, including many pieces for oboe. Unfortunately, the orchestral scores of some of her pieces have been lost.