• Born: Between Oct 1218 and Dec 1218, Bretagne, France
• Married: Jan 1235/6, Lusignan, Vienne, Poitou, France
• Died: 10 Oct 1272, Château de Bouteville, Charente, France

  Research Notes:

A letter of King Henry III dated 19 Oct 1226 confirms his betrothal to "Jolentam filiam Petri ducis Brittanniæ et comitis Richemundiæ". The Chronicon Turonense records the betrothal of "Rex Franciæ Joannem fratrem suum, puerum octennem" and "filiæ Petri Comitis Britanniæ", and the grant of the county of Anjou to him. The marriage contract between "P. dux Britannie, comes Richemondie…Yolendi filie mee" and "Ludovicus, rex Francorum…Johannem fratrem suum" is dated 27 Mar [1226/27]. The Annals of Dunstable record the betrothal of "filiam comitis Britanniæ" and "rex Franciæ…fratri suo minori", who received the county of Anjou, in 1227. Her betrothal to Thibaut IV Comte de Champagne is confirmed by a letter from King Louis IX to Comte Thibaut, dated 1229, which states that the king had "entendu que vous avez convenancé et promis à prendre à femme la fille du Comte Pierre de Bretaigne" and forbade him from proceeding, adding "la raison pourquoi vous savez bien" (without providing any further explanation). The 1229 date (cited by Lobineau) is presumably incorrect, assuming that the date of death of Comte Thibaut´s second wife is correctly reported as 11 Jul 1231.... This suggested redating is confirmed by a letter from Pope Gregory IX to the archbishop of Bourges dated 24 Apr 1232 stating that "Campaniæ et Britanniæ comites" intended to arrange a marriage alliance prohibited by the degrees of consanguinity and forbidding the arrangement.

Dame de la Fère-en-Tardenois, de Chailly et de Longjumeau. Ctss de Penthièvre 1236, as her dowry. The Chronicon Britannicum records in 1236 that "Penthevria excepto Jugonio" was granted to "Hugoni filio comitis de Marchia" with "filia Petri comitis totius Britanniæ". Ctss de Porhoët, by grant of her brother. "Hugo Lebrun, filius comitis Marchie primogenitus, et dominus Lambalie et Hyolandis uxor sua" noted the end of the excommunication of "Guidonem de Argenteio dominum de Plancoit" in a charter dated 1246. "Hugo Brunus comes Engolisme et domina Hiolendis uxor eius heres et domina Penthevrie" confirmed the donation to Lamballe made by "domini P. quondam ducis Britannie genitoris predicte Hiolendis uxoris nostre...domine Ælidis ducisse Britannie et comitisse Richem. genitricis predicte Hiolendis" by charter dated Jul 1247.

Regent of La Marche and Angoulême 1250-1256. ²