The Chronicle of Parcé records Guillaume as son of Baudouin des Roches en Poitou and his wife Alix de Châtellerault. His parentage is confirmed by a donation dated 1215 made by "Guillelmus de Rupibus Senescallus Andegavensis" to the abbey of Perseigne of property which had belonged to "Herberti de Rupibus patris Balduini de Rupibus patris sui".
Seigneur de Longué-Jumelles, de Château-du-Loir. “Guillaume de Roches” donated property to the abbey of la Boissière, with the consent of “Philippe sa femme et par Hilaire mère de la dite Philippe”, by undated charter.
Seneschal of Anjou. “Guillaume des Roches sénéchal d’Anjou” confirmed an agreement between the monks of Villeloin and “Tancrède” concerning “des bois de Chedon” by charter dated 1201. “Guillaume des Roches sénéchal d’Anjou” confirmed the donation of “de la métaire de Perreria située à Château-du-Loir, ainsi que du moulin” to Louroux abbey made by “Beaudoin des Roches son fils” by charter dated Mar 1207 (O.S.?). King Philippe II confirmed a charter dated 1218 under which “Guillaume des Roches sénéchal d’Anjou partant pour l’Albigeois” established the rights in his succession of “Jeanne et Clémence ses deux autres [“autres” a mistake?] filles”, with the consent of “Marguerite de Sablé sa femme et d’Amauri de Craon mari de sa fille aînée”, by charter dated Mar 1219, which specifies that the former would receive Sablé, Briollai, Châteauneuf-sur-Sarthe, Précigné et Brion and the latter Château-du-Loir, Maiet, la Suze and Louplande.
The Chronicon Turonense Magnum records the death in 1222 of "Guillelmus de Rupibus senescallus Andigavensis" and his burial "in ecclesia monialium Cistercensis ordinis…Bonus Locus" which he had founded "juxta Castrum Lidi". 1
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