Jean Alexandre Vaillant (1804 – 21 March 1886) was a French and Romanian teacher, political activist, historian, linguist and translator, who was noted for his activities in Wallachia and his support for the 1848 Wallachian Revolution. A Romantic nationalist and Freemason, he was an associate of the liberal faction in both Wallachia and Moldavia, as well as a collaborator of Ion Heliade Rădulescu, Ion Câmpineanu, Mitică Filipescu, and Mihail Kogălniceanu.