Robert I, Count of Dreux

In 1137 he received the County of Dreux as an appanage from his father.^[2] He held this title until 1184 when he granted it to his son Robert II.

In 1139 he married Agnes de Garlande.^[3] In 1145, he married Hawise of Salisbury,^[4] becoming count of Perche, as regent to his stepson Rotrou IV. By his third marriage to Agnes de Baudemont in 1152,^[5] he received the County of Braine-sur-Vesle, and the lordships of Fère-en-Tardenois, Pontarcy, Nesle, Longueville, Quincy-en-Tardenois, Savigny, and Baudemont.^[6]

Robert I participated in the Second Crusade and was at the Siege of Damascus in 1148.^[7] He was credited for bringing the Damask rose from Syria to Europe.^[8] In 1158, he fought against the English and participated in the Siege of Séez in 1154.

1. Agnes de Garlande (1122–1143), daughter of Anseau de Garlande, count of Rochefort.^[3]

• Simon (1141 – bef. 1182), lord of La Noue

2. Hawise of Salisbury (1118–1152),^[9] widow of Rotrou III and daughter of Walter Fitz Edward of Salisbury, SheriffofWiltshire

• Adèle of Dreux (1145 – aft. 1210), married firstly Valéran III, count of Breteuil,^[10] secondly Guy II, lord of Châtillon-sur-Marne,^[11] thirdly Jean I de Thorotte, fourthly Raoul III de Nesle, count of Soissons.^[12]
• Alice or Adelheid (1144–?)

3. Agnes de Baudemont, Countess of Braine, widow of Milo III of Bar-sur-Seine (1130 – c. 1202).^[6]

• Robert II (1154–1218), count of Dreux and Braine.^[13]
• Henry (1155–1199), bishop of Orléans^[9]
• Alix (1156 – aft. 1217), married Raoul I, lord of Coucy^[12]
• Philippe (1158–1217), bishop of Beauvais.^[13]
• Isabella (1160–1239), married Hugh III of Broyes^[14]
• Peter (1161–1186)^[9]
• William (1163 – aft. 1189), lord of Braye, Torcy, and Chilly^[9]
• John (1164 – aft. 1189)^[9]
• Mamilie (1166–1200)
• Margaret (1167–?), nun

• Dyggve, Holger Petersen (1935). "Personnages historiques figurant dans la poésie lyrique française des XII e et XIII e siècles. III: Les dames du »Tournoiement» de Huon d'Oisi". Neuphilologische Mitteilungen. 36 (2).
• Dyggve, Holger Petersen (1942). "Personnages historiques figurant dans la poésie lyrique française des XII e et XIII e siècles XIV: Identification de Noblet, ami de Conon de Béthune, Gace Brulé et Pierre de Molins". Neuphilologische Mitteilungen (in French). 43 (1): 7-20.
• Fedorenko, Gregory (2013). "The Thirteenth Century Chronique De Normandie". In Bates, David (ed.). Anglo-Norman Studies XXXV: Proceedings of the Battle Conference 2012. The Boydell Press.
• Gilbert of Mons (2005). Chronicle of Hainaut. Translated by Napran, Laura. The Boydell Press.
• Guyotjeannin, Olivier, ed. (2000). Le chartrier de l'abbaye prémontrée de Saint-Yved de Braine (1134-1250). Ecole des Chartes.
• Michel, Edmond (1902). Histoire de la ville de Brie-Comte-Robert (in French). Vol. 1. Dujarric & Cie.
• Previté-Orton, C. W. (1979). The Shorter Cambridge Medieval History. Vol. 1, The Later Roman Empire to the Twelfth Century (10th ed.). Cambridge University Press.
• Pollock, M. A. (2015). Scotland, England and France After the Loss of Normandy, 1204-1296: Auld Amitie. Boydell & Brewer.
• Power, Daniel (2004). The Norman frontier in the twelfth and early thirteenth centuries. Cambridge University Press.
• Suger (2018). Selected Works of Abbot Suger of Saint Denis. The Catholic University of America Press.
• Wood, Charles T. (1966). The French Apanages and the Capetian Monarchy, 1224-1328. Harvard University Press.