MARGUERITE de Mayenne (-15 Jan before 1264). "Gervasia domina Dinanni" donated property to the priory of Saint-Magloire de Léhon, for the souls of "heredum meorum Johanne, Isabelis et Margarite" and for the souls of "Juhelli, Gaufridi et Ricardi maritorum meorum", by charter dated 1233[766]. Her parentage and marriage are confirmed by the charter dated 1241 under which "Droco de Melloto, Locharam et Meduane dominus" [married to her older sister] wrote to "fratri suo domino Henrico de Avalgor", naming "bone memorie domine Gervasie"[767]. "Henricus de Avalgor, filius Alani comitis…et Margarita uxor mea" renewed a donation of property to the abbey of Bon-Repos by "Gervasia domina Dinani", for the soul of "bone memorie Gaufridi vicecomitis de Rohan quondam mariti sui", by charter dated 1229[768]. "Henricus de Avaugor" records that "castrum meum de Ponte Ursionis" belonged to "me et Margaritam uxorem meam" in a charter dated 2 Sep 1233[769]. "Margarita uxor…Henrici de Avaugor" donated property owned by "domina Gervasia mater mea" to the abbey of Saint-Aubin-des-Bois, with the consent of "Alani et Juhelli filiorum meorum", by charter dated 1237[770]. The necrology of Notre-Dame-de-Beauport records the death "XVIII Kal Feb" of "domine Margarite uxoris domini Henrici d´Avalgor"[771]. m (before 1220) HENRI [II] d'Avaugour ex-Comte de Penthièvre Seigneur de Goëllo, son of ALAIN de Bretagne Comte de Penthièvre & his second wife Adélaïde --- ([1205]-6 Oct 1281, bur Dinan).