He was the son of his predecessor, Guillaume, Lord of Coucy, Marle, Fère, Oisy, and Mount-Mirel, who held the titles from 1321–1335; and his second wife, Isabeau de Châtillon-St-Pol, daughter of Guy IV, Count of Saint-Pol.
He became the successor to Guillaume, Lord of Coucy, Marle, Fère, Oisy, and Mount-Mirel, who held the titles from 1321–1335; and his second wife, Isabeau de Châtillon-St-Pol, daughter of Guy IV, Count of Saint-Pol.