Marc Elder (Marcel Tendron) (31 October 1884, Nantes – 16 August 1933, Saint-Fiacre-sur-Maine) was a French writer, winner of the Prix Goncourt for The People of the Sea.
He was a critic and art historian, a Knight of the Legion of Honor, he was curator of the Chateau des Ducs de Bretagne, in Nantes. The Place Marc Elder in the center of Nantes is named for him.
Le Peuple de la mer, G. Oudin, 1914Deux essais: Octave Mirbeau, Romain Rolland, G. Cres, 1914La vie apostolique de Vincent Vingeame, Calmann-Levy, 1917Le sang des dieux, A. Michel, 1921A Giverny, chez Claude Monet, Bernheim-Jeune, 1924Gabriel-Belot, peintre imagier, A. Delpeuch, 1927Pays de Retz, Emile-Paul, 1928Les Dames Pirouette,' J. Ferenczi & fils, 1929Croisieres J. Ferenczi & Fils, 1931La belle Eugenie: roman, Ferenczi et fils, 1931Jacques et Jean: bois originaux en couleurs de Robert Antral, Ferenczi et Fils, 1931La Bourrine - Le Beau livre N°4, 1932Jacques Cassard: corsaire de Nantes, J. Ferenczi, 1933Marc Elder, ou, Un reve ecartele, Roger Douillard ed., Cid editions, 1987Charles F. Stuckey, ed. (1985). "A Giverny, chez Claude Monet". Monet: a retrospective. Beaux Arts Editions. ISBN 978-0-88363-301-4. 