Jean Ignace Isidore Gérard (13 September 1803, Nancy, Meurthe-et-Moselle – 17 March 1847, Vanves), generally known by the pseudonym of Jean-Jacques or J. J. Grandville, was a French caricaturist.He began to draw when very young and published his first lithograph, the Cherry Seller, in Nancy in 1825. From the start he copied the style of the little satirical scenes that had been popularized by the English and French satirical magazines of the period such as the Nain jaune.