John III, Count of Roucy
John III, of the House of Pierrepont, was count of Roucy, the son of Count John II and Marie of Dammartin. He married Isabelle of Mercoeur (c. 1240-1285), and their son John IV succeeded him in 1282 or 1285.
John III, of the House of Pierrepont, was count of Roucy, the son of Count John II and Marie of Dammartin. He married Isabelle of Mercoeur (c. 1240-1285), and their son John IV succeeded him in 1282 or 1285.