Abstract: The Rabelais library has yet to be reconstructed. This article briefly presents a new Greek volume hitherto unknown, perhaps the last in private hands, bringing together Julius Pollux’s Onomasticon and Étienne de Byzance’s De Urbibus, both published by the Giuntas in Florence, in 1520 and 1521. This offers new proof of the importance of Greek in the intellectual work of Rabelais.