Cyrus, Vicomte and later Comte Timbrune de Thiembronne de Valence (1757-1822), lover of the old Duc d'Orléans' morganatic wife Madame de Montesson, and married to her nièce's daughter, Péky de Genlis in 1784, was an homme à la mode under Louis XVI. Colonel of the Chartres-Dragoons regiment, he became General under the revolution but deserted in 1793 with the future King Louis-Philippe and General Dumouriez. Nevertheless, he was styled Sénateur and General under Napoleon. He took part in the Spanish and Russian campaigns. Even under Louis XVIII, he did not lose his influence and was styled Pair de France. Further biographical information can be found in: Gabriel de Broglie, Le Général de Valence, Paris 1972.