Étienne Victor Tréfeu (de Tréval) (born Saint-Lô, Manche, September 25, 1821 – died Paris, June, 1903), was a French librettist, song writer and theatre manager.
He is best known for his work with Jacques Offenbach.
He originally came to prominence as a writer of popular songs.
In 1873 he became the administrator of the Théâtre de la Gaîté in Paris.