Jacques Duphly (also Dufly, Du Phly; 12 January 1715 – 15 July 1789) was a French harpsichordist and composer.
Early career as an organist
He was born in Rouen, Province of Normandy, France, the son of Jacques-Agathe Duphly and Marie-Louise Boivin. As a boy, he studied the harpsichord and organ, and was employed as organist at the cathedral in Évreux. He obtained his first position at the cathedral of St. Eloi at the age of nineteen. In 1740 he added a second position at the church of Notre Dame de la Ronde, which he maintained with the help of his sister Marie-Anne-Agathe, who substituted for him. According to Louis-Claude Daquin: For some time he was organist at Rouen, but doubtless finding that he had a greater gift for the harpsichord, he abandoned his first instrument. One may suppose that he did well, for he passes in Paris for a very good harpsichordist. He has much lightness of touch and a certain softness, which, sustained by ornaments, marvelously render the character of his pieces. According to Friedrich Wilhelm Marpurg he devoted himself to the harpsichord in order not to spoil his hand with the organ.