ALIX de Thouars ([1200]-21 Oct 1221, bur 24 Nov 1225 Villeneuve-les-Nantes, Abbaye de Notre-Dame). The Genealogia Comitum Richemundiæ names "Adelicia" as the daughter of "Constantia filia Conani" and her third husband "Guidoni de Thoarcio", stating that she married "domno Petro Mauclerc"[325]. 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"[326]. A Chronicon Comitum Pictaviæ et Aquitaniæ Ducum names "Alipsam et Catherinam" as the two daughters of "Wido…comes de Thoarcio" and "Constantiam Gaufridi Ducis Britanniæ relictam", stating that Alix married "Petro Comiti Drocarum"[327]. She succeeded her half-brother in 1203 as ALIX Dss of Brittany, Ctss of Richmond. 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[328]. 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"[329]. The Chronique de Guillaume de Nangis records that daughter of Guy de Thouars and Constance de Bretagne married "Pierre Mauclerc, fils de Robert comte de Dreux"[330]. The Chronicon Britannicum records the death "XII Kal Nov" in 1221 of "Aalis Ducissa Britanniæ"[331]. Betrothed (contract Paris 7 Dec 1209, broken) to HENRI d'Avaugour, son of ALAIN de Bretagne Comte de Penthièvre & his second wife Adélaïde --- ([1205]-6 Oct 1281, bur Dinan). He succeeded his father in 1212 as Comte de Penthièvre. m ([Mar 1213/Oct 1214]) as his first wife, PIERRE de Dreux, son of ROBERT II Comte de Dreux et de Braine & his second wife Yolande de Coucy ([1187]-at sea off Damietta end-May 1250, bur Braine, église abbatiale de Saint-Ived). He swore allegiance at Paris 27 Jan 1213 to Philippe II "Auguste" King of France as PIERRE I "Mauclerc" Duke of Brittany. Comte de Penthièvre by annexation 1214. Created Earl of Richmond by Henry III King of England 16 Jan 1218/19 (confiscated Nov 1224, restored Oct 1229, confiscated again Jan 1235). He surrendered the Duchy of Brittany to his son in 1237, after which he called himself PIERRE de Braine. He accompanied King Louis IX on crusade in 1249 and was captured at Faraskur 6 Apr 1250, after being wounded at the battle of Mansourah. He died at sea on his way back to western Europe.