GUY [I] de Nevers ([1149]-Tonnerre, Yonne 19 Oct 1175). "W Nivernensium comes" granted taxation rights to the church of Autun with the consent of "Ida cometissa et filius meus Guido…[et] Guillelmus filius meus" by charter dated 1158[2541]. "Willelmus comes Nivernis filius Willelmi comitis qui obit Autissiodori" granted concessions to Nevers Saint-Etienne, reserving to himself a certain sum either for the marriage of his daughter ("pro filia sua maritanda"), for his journey to Jerusalem ("pro via Hyerosolimitana"), or if he was ransomed, with the consent of "Wido frater eius", by charter dated 1164, confirmed by "Vuido comes Nivernensis" with the consent of "Raynaldus frater meus et uxor mea" by charter dated 1171[2542]. The Chronicon of Robert canon of St Maria, Auxerre names "Guillelmus Nivernensis comes…Guido frater eius" when recording that he succeeded his brother[2543]. He left for Palestine with his brother, returning in [1170][2544] when he succeeded as Comte de Nevers, d'Auxerre, Comte de Tonnerre. "Wido comes Nivernensis" donated property to the abbey of Molesme with the consent of "Ida mater mea et uxor mea Medaldis et Reinaldus frater meus" by charter dated [24 Oct] 1170 which specifies that "Willelmus frater meus" died at Jerusalem[2545]. "Wido comes Nivernis" confirmed the privileges of the church of St Etienne in Nevers by charter dated 1171 which names "proavus meus Willelmus comes Nivernensis…[et] frater meus Willelmus qui ultra mare obit et requiescit in Bethleem"[2546]. He refused to do homage to Hugues III Duke of Burgundy and was defeated and imprisoned at Beaune in Apr 1174. The Annales Nivernenses record the death in 1149 of "Guillelmus comes pater, monachus Chartusiæ"[2547]. Robert of Torigny records the death in 1175 of "comes Nivernensis"[2548]. The necrology of the Cathedral of Nevers records the death "XIV Kal Nov" of "Guido comes"[2549]. m (1168) as her second husband, MATHILDE de Bourgogne, widow of EUDES [II] Seigneur d'Issoudun, daughter of RAIMOND de Bourgogne Comte de Grignon, Seigneur de Vitteaux & his wife Agnès de Thiern Dame de Montpensier (1150-17 Dec [1219], bur Abbaye de Fontevrault). The Chronicle of Alberic de Trois-Fontaines names "Remundus" as father of "Mathildis comitisse Nivernensis"[2550]. She is named without her husband in 1169 (recording the death of her brother-in-law) and with him from 1170. "Matildis uxor mea" consented to the donation to Jully-les-Nonnains by "Guido comes Nivenensis" by charter dated 1170[2551]. "Guido comes Nivernensis" donated property to the abbey of Corbigny by charter dated [1171] in which he names "frater meus Willelmus", witnessed by "Ida mater mea" and with the consent of "Mathildis uxor mea"[2552]. She succeeded her father as Ctss de Grignon, Dame de Vitteaux. She succeeded her mother as Dame de Montpensier. She succeeded her second husband in 1175 as Ctss de Tonnerre. She married thirdly (1176) Pierre de Flandre. "Matilidis comitissa" confirmed a previous donation to Cîteaux by "Agnes mater mea comitissa" for the soul of "patris mei Raimundi" with the consent of "filii mei Odo et Guillermus et Agnes et Ida" by charter dated 1179[2553]. She married fourthly ([1177/80], annulled on grounds of consanguinity 1181) as his first wife, Robert de Dreux. After the annulment of her fourth marriage, she became a nun at Fontevrault. Comte Guy [I] and his wife had three children