Pierre IV d'Essonne

Pierre IV d'Essone was the thirty-seventh regular abbot of Notre-Dame de Mouzon. A monk of Saint-Médard de Soissons, he was provided to Mouzon by the Avignon pope Clement VII after Jean de Saint-Avit's resignation, swearing fealty to the church of Reims on 18 March 1379. In 1381 the king of France named him a councillor.

He bought an estate with his monks and made it all over to them, on condition they remember him at the Monday Mass of Prime. In 1391 he returned to Saint-Médard de Soissons, dying there on 10 January.