HENRI de Blois, son of THIBAUT IV Comte de Blois & his wife Mathilde von Sponheim [Carinthia] (1126-Troyes 17 Mar 1181, bur Troyes, Saint-Etienne). "Teobaudus Blesensis comes" made a donation to Montiérender by charter dated 1139 with the consent of "Matildis comitissa uxor mee et Henricus filius meus"[9]. He left France with King Louis VII in Jun 1147 on the Second Crusade[10]. He succeeded his father in 1152 as HENRI I "le Libéral" Comte de Champagne et de Brie. During his rule, Champagne became a centre of commerce. He was one of the most respected counsellors of the king of France. "Henricus Trecensium comes palatinus" made donations to the abbey of Mores by charter dated 1154[11]. He left France on crusade once more in 1179, with Philippe Count of Flanders. The Chronicle of Alberic de Trois-Fontaines records the death in 1181 of "comes Henricus Trecensis" after returning from overseas[12]. Robert of Torigny records the death in 1182 of "Henricus comes Trecensis" and the succession of "Henricus filius eius natus ex filia Ludovici regis Francorum"[13]. The necrology of the abbey of Mores records the death "XVI Kal Apr" of "comes Henricus Trecensis"[14]. The necrology of Sens cathedral records the death "XVI Kal Apr" of "Henricus comes Campanie"[15]. The necrology of Saint-Loup, Troyes records the death "17 Mar 1180" (presumably O.S.) of "Henricus comes Trecenses"[16]. The necrology of Saint-Etienne, Troyes records the death "17 Mar" of "comes Henricus Campanie"[17]. The Livre d'Anniversaires of Chartres cathedral records the death "XVI Kal Apr" of "Henrici comitis Trecensi"[18].
m (1164) MARIE de France, daughter of LOUIS VII King of France & his first wife Eléonore d'Aquitaine (1145-3 or 11 Mar 1198, bur Cathedral of Meaux, Seine-et-Marne). The Chronicle of Alberic de Trois-Fontaines names "Mariam comitissam Trecensum et Aelidem comitissam Blesensem" as the two daughters of "regi Francie Ludovico" and his wife "Alienor Guilielmi filia comits Pictavorum et Aquitanie ducis"[19]. Her parentage is confirmed by Matthew Paris, who specifies that Marie was the older sister and married the older brother "Henricus filius magni comitis Theodbaldi Flandrensis", although he does not state her name[20]. She was regent of Champagne during the absence of her husband on Crusade 1179-1181, during the minority of her son Henri II 1181-1187, during the latter's absence on Crusade 1190-1197, and during the minority of her grandson Thibaut III 1197-1198. She was the author of "le Lai du Chèvrefeuille", and made her court a literary centre. Philippe d'Alsace Count of Flanders sought to marry her in 1184. The Chronicle of Alberic de Trois-Fontaines records the death in 1198 of "comitissa Maria Campaniensis"[21]. The necrology of Sens cathedral records the death "V Non Mar" of "Maria Trecensis comitissa"[22]. The necrology of Saint-Etienne, Troyes records the death "4 Mar" of "Maria Trecensis comitissa, regis Francorum filia"
http://fmg.ac/Projects/MedLands/CHAMPAGNE%20NOBILITY.htm#_Toc288111575