HENRI ([1205]-23 Feb or 6 Oct 1281, bur Dinan). "Alanus comes, Henrici comitis filius" granted letters of assurance to "domino Andreæ de Vitreio", with the consent of "Henrico filio meo et Alici uxori eius", by charter dated 1209[988]. "Alanus comes, Henrici comitis filius" confirmed the donation to the abbey of Sainte-Marie-de-Boquen, with the consent of "Henrici et Gaufridi filiorum meorum", by charter dated 2 May 1211[989]. He succeeded his father in 1212 as Comte de Penthièvre, under the guardianship of his paternal uncle Geslin (see below) until [1222/24]. He was deprived of all his lands except Goëllo in 1214 by Pierre Duke of Brittany. "Henricus de Avalgor, filius Alani comitis" ratified a donation to the abbey of Notre-Dame-de-Beauport by "Petrus filius Ruallen le Gal" by charter dated 1224[990]. "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[991]. “Henricus de Avaugor” confirmed his homage to Louis IX King of France for “toto feodo meo in Britannia” by charter dated May 1231 which refers to (but does not name) “duos filios meos primogenitos” being given as hostages to the king[992]. He became a friar minor at Dinan. "Henricus de Avaugor dominus Goloye, miles" donated property to the priory of Saint-Magloire de Léhon on becoming a monk, with the consent of "nepotis nostri Henrici de Avaugor domini Meduane, miles" and for the souls of "Juhelli, Gaufridi et Ricardi maritorum meorum", by charter dated Mar 1278[993]. The necrology of Notre-Dame-de-Beauport records the death "VII Kal Mar" of "Henrici d´Avalgor domini Goloie et de Meduana", adding that he was buried "apud Dinannum in conventu Fratrum Minorem"[994]. Betrothed (contract Paris 7 Dec 1209, broken to ALIX de Thouars Dss of Brittany, daughter of GUY de Thouars & his second wife Constance Dss of Brittany ([1200]-21 Oct 1221, bur 24 Nov 1225 Villeneuve-les-Nantes, Abbaye de Notre-Dame). The marriage contract between "G. de Thoarco comes Britannie...A filia mea quam habeo de comitissa Britannie Constancia" and "Alanus filius comitis...Henricus filius predicti Alani primogenitus" is dated 1209[995]. Her first betrothal is confirmed by the charter dated 1209 under which "Alanus comes, Henrici comitis filius" granted letters of assurance to "domino Andreæ de Vitreio", with the consent of "Henrico filio meo et Alici uxori eius"[996]. The Chronicle of Alberic de Trois-Fontaines names "unam filiam Mabiliam" as the child of "Constantiam comitis Conani filia" and her [third] husband "Guido frater vicecomitem de Tuart"[997]. m (before 1220) MARGUERITE de Mayenne, daughter of JUHAEL [II] Sire de Mayenne & his wife Gervaise de Vitré Dame de Dinan (-15 Jan before 1264). "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[998]. “Henricus de Avaugor” records that “castrum meum de Ponte Ursionis” belonged to “me et Margaritam uxorem meam” in a charter dated 2 Sep 1233[999]. "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[1000]. Her parentage is 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"[1001]. The necrology of Notre-Dame-de-Beauport records the death "XVIII Kal Feb" of "domine Margarite uxoris domini Henrici d´Avalgor"[1002]. Henri & his wife had six children