Ralph of Coucy, (c. 1134 – 1191), lord of Coucy, lord of Marle, La Fère, Crécy (sur-Serre), Vervins, Pinon, Landouzy (la-Ville), and Fontaine (lès-Vervins). He was the son of Enguerrand II, Lord of Coucy and Agnes de Beaugency.
By his later marriage, Ralph became cousin to Philip II of France. He attended the King of France in 1181 during the war against Philip I, Count of Flanders. He left for the Holy Land, where he died in the siege of Acre in November 1191.
- M. A. Pollock, Scotland, England and France After the Loss of Normandy, 1204-1296: Auld Amitie, (Boydell & Brewer, 2015), 145.
- A Constellation of Crusade: The Resafa Heraldry Cup and the Aspirations of Raoul I, Lord of Coucy, Richard A. Leson, The Crusades and Visual Culture, ed. Elizabeth Lapina, April Jehan Morris, Susanna A Throop, and Laura J Whatley, (Ashgate Publishing, 2015), 89.