René-Yves Creston (25 October 1898 – 30 May 1964), born René Pierre Joseph Creston, was a Breton artist, designer and ethnographer who founded the Breton nationalist art movement Seiz Breur. During World War II he was active in the French Resistance.

Born in Saint-Nazaire, Creston studied art there and at Ancenis, followed by the École des Beaux-Arts in Nantes and Paris. In 1923, he was one of the founders with Jeanne Malivel and his wife Suzanne Creston, of Ar Seiz Breur (The Seven Brothers), which united dozens of Breton artists and designers in a movement to create a distinctive Breton avant-garde style. Creston participated in the decoration of the Pavilion of Brittany at the Exhibition of Decorative Arts in Par...