尽管她1171年从父亲处继承了里奇蒙伯国,但直到1183/1184年才继承。(见 Judith Everard and Michael Jones, The Charters of Duchess Constance and Her Family (1171–1221), The Boydell Press, 1999, p 38)
Judith Everard, Michael Jones, The Charters of Duchess Constance of Brittany and her Family (1171–1221), The Boydell Press, 1999, p 135: "The first occasion on which the names of Constance and Guy are linked is at Angiers in October 1199. (...) cf. also the date of Gu2 [a grant for the monks of Buzay], which records that on 27 August 1201, Guy was still only in his second regnal year."(“康斯坦丝和居伊的名字第一次链接在一起的时间是在1199年10月的昂热。……也是记录在1201年8月27日的Gu2(为布扎伊的僧侣提供的一笔赠款)的日期,记录说居伊仍然只在他的第二个统治年。”)
Margaret of Huntingdon made a donation for the souls of "herself, Duke Conan IV, and 'our boys', or 'our children' (pro salute anime... puerorum... nostrorum)(亨廷顿的玛格丽特为“她自己,科南四世公爵以及‘我们的男孩’或‘我们的孩子’的灵魂捐款). This would seem to be a reference to at least one son of the marriage who did not survive infancy, leaving Constance as heiress in 1166."(“这似乎是对至少一个没有从婴儿期幸存下来的婚生子的提法,所以幸存下来的康斯坦丝于1166年成为继承人。”) (Everard and Jones, The Charters of Duchess Constance and Her Family (1171–1221), The Boydell Press, 1999, p 94).
据埃弗拉德说,康斯坦丝的兄弟被称为吉约姆的事实似乎表明他不是科南四世的私生子,因为威廉(同吉约姆)是亨廷顿的玛格丽特的一个兄弟的名字。 (Everard, Judith (2000). Brittany and the Angevins: Province and Empire, 1158-1203. Cambridge University Press, 2000, p 43).
Eales, Richard. Ranulf (III), sixth earl of Chester and first earl of Lincoln (1170–1232). Oxford Dictionary of National Biography online. Oxford University Press. 2008 [2004].
Borgnis Desbordes, Eric, Constance de Bretagne (1161–1201), une duchesse face à Richard Cœur de Lion et Jean sans Terre, Yoran embanner, 2018, p. 408-409
Michael Jones, « Eleanor, suo jure duchess of Brittany (1182x4–1241) », Oxford Dictionary of National Biography, Oxford University Press, 2004 ; online edition, January 2008.
Quaghebeur, Joëlle. La Cornouaille du IXème au XIIème siècles : mémoire, pouvoirs, noblesse, Rennes Quimper, Presses universitaires de Rennes, Société archéologique du Finistère, 2002, p. 367.
Borgnis Desbordes, Eric, Constance de Bretagne (1161-1201), une duchesse face à Richard Cœur de Lion et Jean sans Terre, Yoran embanner, 2018, p. 437, note 200
More information 布列塔尼女公爵康斯坦丝 彭蒂耶夫王朝(英语:Counts and dukes of Penthièvre)出生于:1161年逝世于:1201年, 统治者头衔 ...