His first marriage with Mahaut of Burgundy (1150–1192) in 1178 ended with separation in 1181 and produced no children. The excuse for the annulment was consanguinity: Mahaut and Robert were both great-great-grandchildren of William I, Count of Burgundy and his wife Etiennette, and they were both Capetian descendants of Robert II of France.[6]
His second marriage to Yolande de Coucy (1164–1222), the daughter of Ralph I, Lord of Coucy and Agnès de Hainaut,[7] produced several children:[8]
Robert III (c. 1185 – 1234), Count of Dreux and Braine[9]
Count Robert's tomb bore the following inscription, in Medieval Latinhexameters with internal rhyme:
Stirpe satus rēgum, pius et custōdia lēgum,
Brannę Rōbertus comes hīc requiescit opertus,
Et jacet Agnētis situs ad vestīgia mātris.
Of which the translation is: "Born from the race of kings, and a devoted guardian of the laws, Robert, Count of Braine, here rests covered, and lies buried by the remains of his mother Agnes."
It is also dated Anno Gracię M. CC. XVIII. die innocentum, that is, "In the Year of Grace 1218, on the Feast of the Holy Innocents."
Evergates, Theodore (1999). Aristocratic women in medieval France. University of Pennsylvania Press.
Evergates, Theodore (2007). The Aristocracy in the County of Champagne, 1100–1300. University of Pennsylvania Press.
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.
Gislebertus of Mons (2005). Chronicle of Hainaut. Translated by Napran, Laura. Boydell Press.
Mémoires de la Société des lettres, sciences et arts de Bar-le-Duc, Vol.2, Ed. Société des lettres, sciences et arts de Bar-le-Duc, Contant Laguerre Imprimeur Editeur, 1903.
Nicholson, Robert Lawrence (1973). Joscelyn III and the fall of the crusader states 1134–1199. Brill.
Petit, Ernest, ed. (1889). Histoire des ducs de Bourgogne de la race Capétienne. Vol. 3. Imprimerie Darantiere.
Pollock, M. A. (2015). Scotland, England and France After the Loss of Normandy, 1204–1296: Auld Amitie. Boydell & Brewer.
Power, Daniel (2008). The Norman Frontier in the Twelfth and Early Thirteenth Centuries. Cambridge University Press.
Richard, Jean (1983). Lloyd, Simon (ed.). Saint Louis, Crusader King of France. Translated by Birrell, Jean. Cambridge University Press.