"This melody was first known as Ah! Vous Dirai-Je, Maman, the music of which appeared (without words) in 1761 in Les Amusements d'une Heure et Demy by Mr. Bouin (Paris). The words and music appear in a manuscript entitled Recueil de Chansons about 1765 under the title Le Faux Pas, p. 43." (James J. Fuld, The Book of World-Famous Music, 4th ed., p. 593) Mozart's variations on this melody were published in 1785.
~Masato