"Sigefredus Cinnomannicæ….episcopus" donated property to Tours-Saint-Julien, with the consent of "senioris nostri Hugonis…ac filiorum eiusdem…Hugonis et Fulchonis", by charter dated Feb 971. Hugues [III]'s birth date range is estimated by working back from the birth date range estimated for his grandson Comte Hugues [IV], which is reasonably robust... "Hugo comes Cenomannus cum filiis meis ac filiabus" donated property to the abbey of Saint-Pierre-de-la-Cour du Mans by charter dated to [971/997], subscribed by "Hugonis filii eius".
He succeeded as Comte du Maine. “Hugo comes Cenomannus” ... donated “terras...Bernationum” to Saint-Pierre de la Couture “cum...filiis meis ac filiabus” by charter dated to 990, subscribed by “Hugonis comitis, Hugonis filii eius...”. "Hugo Cinomannensis comes" donated property to the abbey of Saint-Victeur du Mans with the consent of "Hugonis filii Herbrannis" (not yet identified), by charter dated to [1000/15] which is subscribed by "Herbertus frater comitis". Guillaume of Jumièges recounts that "comitibus Hugone...Cenomanensi ac Waleranno Mellendesi" were among those who joined the army of Eudes Comte de Blois in attempting to capture the château de Tillières {Verneuil, Eure} from Richard II Duke of Normandy, and that Hugues escaped after hiding in a sheep's stable and disguising himself as a shepherd before regaining Le Mans, an event dated to the early 1000s. "Hugo Cenomannensis comes" donated property to the abbey of Mont-Saint-Michel by charter dated 1014, witnessed by "Roscelini vicecomitis, Hameli de Leido Castello, Haymonis de Medano, Herberti fratris comitis, Droci filii Milonis, Odilarii Drudi".
He is assumed to have died before 6 Jul 1016, the date of a charter in which "Herbertus Evigilans canem cognomine" donated property to the abbey of Saint-Pierre-de-la-Cour du Mans. 1