Hector-Jonathan Crémieux (10 November 1828 – 30 September 1893) was a French librettist and playwright. His best-known work is his collaboration with Ludovic Halévy for Jacques Offenbach's Orphée aux Enfers, known in English as Orpheus in the Underworld. Life Crémieux was born in Paris to a Jewish family - he was related to the lawyer Adolphe Crémieux . He studied law and then worked in the civil service. His first play, Fiesque (1852) was a historical drama, but before long he started to write comedies and then, in collaboration, operetta and opéra comique librettos. His collaborations with Halévy were often written under the joint pseudonym Paul d'Arcy. In 1887, Crémieux became secretary-general of the Société des Dépôts Comptes Courants, and ceased writing. Five years later, the Société collapsed and he committed suicide by gunshot in Paris. Libretti For Jacques Offenbach Le savetier et le financier (1856) - with E About Une demoiselle en loterie (1857) - with Louis-Adolphe Jaime Orphée aux enfers (Orpheus in the Underworld) (1858) - with Ludovic Halévy Geneviève de Brabant (1859) - by Louis-Adolphe Jaime and Etienne Tréfeu (revised by Crémieux with Tréfeu) La chanson de Fortunio (1861) - with Ludovic Halévy Le pont des soupirs (1861) - with Ludovic Halévy M. Choufleuri restera chez lui le . . . (1861) - with M de Saint Rémy, Ernest L'Épine and Ludovic Halévy Le roman comique (1861) - with Ludovic Halévy Jacqueline (1862) - with Ludovic Halévy, with common pseudonym Pol d’Arcy Les bergers (1865) - with Philippe Gille Robinson Crusoé (1867) - with Eugène Cormon La jolie parfumeuse (1873) - with Ernest Blum Bagatelle (1874) - with Ernest Blum La foire Saint-Laurent (1877) - with A de Saint-Albin For Léo Delibes Les eaux d’Ems (1861) - with Ludovic Halévy For Hervé Le petit Faust (1869) - with Louis-Adolphe Jaime Les Turcs (1869) - with Louis-Adolphe Jaime Le trône d'Écosse (1871) - with Louis-Adolphe Jaime La veuve du Malabar (1873) - with A. Delacour La belle poule (1875) - with A de Saint-Albin For Léon Vasseur La famille Trouillat (1874) - with Ernest Blum Plays Amongst the plays written by Hector-Jonathan Crémieux are: Fiesque: drame en cinq actes et huit tableaux, en vers, d'après Schiller (1852) - with his brother, Émile Crémieux, and based on Friedrich Schiller's play Die Verschwörung des Fiesco zu Genua Germaine: drame en cinq actes et huit tableaux (1858) - with Adolphe d'Ennery