Léon Alfred Fourneau (9 December 1867, in Paris – 17 May 1953, in Paris) was a French humourist, music-hall artist, playwright and songwriter. Originally trained as a lawyer he invented the stage- and penname Xanrof by inversion of the Latin of his French surname ("furnace"), before finally legally changing his name to Léon Xanrof.Yvette Guilbert experienced early success singing Xanrof's songs at Rodolphe Salis' cabaret Le Chat Noir.