GUY (-château de Chemillé 23 Apr 1213, bur 24 Nov 1225 Villeneuve-les-Nantes, Abbaye de Notre-Dame). “Aimericus vicecomes Thoarcii” donated property to Chaise-le-Vicomte by undated charter, witnessed by “Aumou mater vicecomitis et Sibilla uxor eiusdem...fratres vicecomitis Guido, Hugo, Gaufridus, Raimundus...vicecomitis sorores Maria, Amabilia”[1573]. The Chronicle of Alberic de Trois-Fontaines records that Philippe II King of France besieged "Albam Marnam castrum" in 1196 and captured "Guido frater Reymundi vicecomitis Thoarcensis", who later married "matrem Arturi iunioris Constantiam relicta…Gaufridi" and became "comes Britannie"[1574]. An order of King John dated 4 Jun 1202 recorded the homage of "A. vic Toarc" naming "Guidon de Toarc, Hug de Toarc fratrum meorum…" as fiduciaries and providing "Gaufr filium meum" as hostage[1575]. After the death of Arthur Duke of Brittany in 1203, he was chosen by the nobles of Brittany as GUY Duke of Brittany during the minority of his daughter. His English lands were confiscated in 1203. Philippe II "Auguste" King of France conquered Brittany in 1206, deposed Guy as Duke but left him as Regent, a post which he continued to hold until 1213. The Chronique de Guillaume de Nangis records that "Guy de Thouars" died of leprosy[1576]. m firstly (1199) as her third husband, CONSTANCE de Bretagne, widow firstly of GEOFFREY of England Duke of Brittany and repudiated wife secondly of RANULF "de Blundeville" Earl of Chester, daughter of CONAN IV Duke of Brittany & his wife Margaret of Scotland ([1161]-[Nantes] [3/5] Sep 1201, bur 24 Nov 1225 Villeneuve-les-Nantes, Abbaye de Notre-Dame). The Chronicle of Alberic de Trois-Fontaines names "Constantiam comitis Conani filia" as wife of "Gaufridus dux Britannie comes Richemontis filius Henrici regis Anglie natu tertius", specifying that she married [thirdly] "Guido frater vicecomitem de Tuart"[1577]. The Genealogia Comitum Richemundiæ records that "Constantia filia Conani" married thirdly "Guidoni de Thoarcio"[1578]. The Annals of Burton record the death in 1201 of “Constantia mater Arthuri comitis Britanniæ”[1579]. The Genealogia Comitum Richemundiæ records the death in 1201 of "Constantia filia Conani" and her burial "apud Begar"[1580]. The Chronicon Britannicum records the death "III Non Sep" in 1201 of "Constantia Ducissa Britanniæ"[1581]. Another Chronicon Britannicum records the death "pridie non Sep" in 1201 of "Constantia comitissa, Conani filia, mater Arturi"[1582]. The Chronicon Ruyensis Cœnobii records the death in 1201 of "Constantia Comitissa apud Nannetum"[1583]. She died in childbirth. m secondly ([1203]) EUSTACHIE d'Argenton dite de Chemillé Dame de Chemillé, widow of GUILLAUME [V] Vicomte d'Aulnay, daughter of PIERRE d'Argenton & his wife Sibylle de Mortagne (-after 1244). She married secondly Renaud de Maulévrier (-after 1244). Guy & his first wife had two children