-https://fr.wikipedia.org/wiki/Alain_de_Go%C3%ABlo

Alain I de Treguier, comte de Penthievre

From Medlands:

http://fmg.ac/Projects/MedLands/BRITTANY.htm#AlainAvaugourdiedbefor...

ALAIN (-29 Dec 1212 or 1 Jan 1213). "Henricus comes" donated property to the priory of Saint-Magloire de Léhon for the soul of "Roberti comitis", with the consent of "filiorum meorum Alani, Stephani atque Conani", by charter dated [1151/59][971]. He succeeded his cousin Geoffroy as Comte de Penthièvre. "Alanus Henrici comitis filius" founded the abbey of Saint-Rion, with the consent of "P. uxoris mee, Ste. et Con. fratrum meorum", by charter dated to [1184/86][972]. A charter dated Jul 1219 records donations to Beauport abbey made by "Alanus Henrici comitis filius" dated “anno quo rex Ricardus promotus fuit in regem” [1189] witnessed by “...domina Petronilla uxor domini Alani, Aliena sponsa domini Conani”[973]. He recovered his father's lost inheritance of Guingamp[974]. "Alanus, dominus de Goellou, Henrici comitis filius" founded the abbey of Notre-Dame-de-Beauport, for the souls of "Henrici comitis patris mei et Mathildis matris mee…", with the consent of "P. uxoris mee et Stephani et Conani fratrum meorum", by charter dated 1202[975]. The undated record of an enquiry relating to the property rights of Henri d´Avaugour states that "Geffroi comte de Lamballe fils [de] Rivallon" granted “Pentevre et son droit de primogeniture en toute la terre qu´il avoit en Bretagne” to “Alain fils [de] Henri” before the French king, with the consent of “ses neveux, enfans de O. Tournemine et d´Edie sa sœur”[976]. "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[977]. "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[978]. The Chronicon Britannicum records the death "IV Kal Jan" in 1212 of "Alanus Comes, filius Henrici comitis"[979]. The Chronicon Savigniacensis Monasterii records the death "Kal Jan" in 1212 of "Alanus comes de Goilou, filius Henrici comitis"[980].

m firstly (before 1186) PETRONILLE de Beaumont, daughter of RICHARD [I] Vicomte de Beaumont & his wife Lucie de Laigle (-19 Aug [1203]). "Alanus Henrici comitis filius" founded the abbey of Saint-Rion, with the consent of "P. uxoris mee, Ste. et Con. fratrum meorum", by charter dated to [1184/86][981]. A charter dated Jul 1219 records donations to Beauport abbey made by "Alanus Henrici comitis filius" dated “anno quo rex Ricardus promotus fuit in regem” [1189] witnessed by “...domina Petronilla uxor domini Alani, Aliena sponsa domini Conani”[982]. "Alanus, dominus de Goellou, Henrici comitis filius" founded the abbey of Notre-Dame-de-Beauport, for the souls of "Henrici comitis patris mei et Mathildis matris mee…", with the consent of "P. uxoris mee et Stephani et Conani fratrum meorum", by charter dated 1202[983]. The necrology of Notre-Dame-de-Beauport records the death "XIV Kal Aug" of "Petronille comitisse; Merhaute prime uxoris fundatoris nostri"[984].

m secondly (1204) ADELAIDE, daughter of --- (-13 Oct 1216). The Chronicon Britannicum records the death in 1216 of "Aheles comitissa, Alani Comitis uxor, mater Henrici"[985]. A clue as to her origin is contained in the charter dated Aug 1234 under which her son “Henricus de Alvagorio” received “castrum de Gaisclino” from “domino Solino avunculo meo”[986]. The necrology of Notre-Dame-de-Beauport records the death "III Id Oct" of "Aeladis comitisse, secunde uxoris comitis Alani fundatoris nostri"[987].

Alain & his second wife had two children:

a) 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:

i) ALAIN d'Avaugour (before 1235-27 Sep before 1267). “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[1003]. Baron de Mayenne, Vicomte de Dinan. - BARONS d'AVAUGOUR et de MAYENNE.

ii) JUHAËL d´Avaugour . “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[1004]. "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[1005]. Seigneur de Kergrois. m CATHERINE de Léon, daughter of HERVE [III] de Léon Seigneur de Châteauneuf & his wife ---. The primary source which confirms her parentage and marriage has not yet been identified.

iii) HENRI . The primary source which confirms his parentage has not yet been identified. Seigneur de Goello. m PHILIPPA de Rohan, daughter of ALAIN [V] Vicomte de Rohan & his wife ---. The primary source which confirms her parentage and marriage has not yet been identified.

iv) GEOFFROY (-after 1282). A charter dated 1282 records an agreement between “Henricum d´Avaugour militem dominum de Gouelou et Meduanæ” and “Gaufridum d´Avaugour patruum suum” concerning the succession of “Henrici d´Avaugour quondam militis patris dicti Gaufridi et avi dicti Henrici”[1006].

v) MARIE de Penthièvre . The primary source which confirms her parentage has not yet been identified.

vi) JEANNE (-26 Feb ----). The necrology of Notre-Dame-de-Beauport records the death "IV Kal Mar" of "domine Johanne d´Avalgor, filie Henrici et uxoris Gaufridi de Dinanno militis"[1007].

b) GEOFFROY Boterel (-1281). "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[1008]. "Gaufridus Boterel, Alani filii comitis filius" donated property to the abbey of Notre-Dame-de-Beauport by charter dated 1233 which names "frater meus Henricus de Avaugour"[1009]. Seigneur de Quintin.

m EUSTACHIE de Vitré, daughter of ANDRE [III] Seigneur de Vitré & his first wife Catherine de Thouars.