Jean I "le Roux" DE BRETAGNE Earl of Richmond
- Born: 1217
- Married: After 16 Jan 1236
- Died: 8 Oct 1286, Château de l'Isle, Férel, Morbihan, Bretagne, France
Another name for Jean was Jean I "le Roux" DE DREUX Duc de Bretagne, Earl of Richmond.
The Chronicon Ruyensis Cœnobii records the birth in 1217 of "Johannes filius Petri Comitis et Aelidis Comitissæ Britanniæ". The Chronicon Britannicum records the birth in 1218 of "Johannes, filius Petri Ducis Britanniæ". On his marriage his father-in-law declared Jean as his heir in Navarre, even if he subsequently had a male heir. After his majority, his father resigned the duchy and Jean swore allegiance to Louis IX King of France in Paris 16 Nov 1237 as JEAN I "le Roux" Duke of Brittany, Seigneur de Pontarcy, de Brie-Comte-Robert et de la Fère-en-Tardenois. Seigneur de Muzillac . He renounced his rights to Navarre for an annuity of 3,000 livres, by agreement 1254. Châtelain de Dinan 1264-1265. Seigneur de Hédé, de Hennedon-le-Viel, de Léon et de la Roche-Derrien 1265. Vicomte de Gourin . Henry III King of England restored him as Earl of Richmond at Woodstock 15 Jul 1268, but he immediately surrendered the earldom to his son. He accompanied Louis IX King of France on his second Crusade in 1270. Comte de Penthièvre, Seigneur de Lavaux 1272. Comte de Léon 1276. The Chronicon Britannicum records the death "Id Oct" 1286 of “Joannes comes Britanniæ fundator abbatiæ de Precibus” and the succession of “Joannes filius eius”.
Jean married Blanca DE NAVARRA Infanta doña, daughter of Cte Thibaut IV DE CHAMPAGNE King of Navarre (Teobaldo I) and Agnès DE BEAUJEU, after 16 Jan 1236. (Blanca DE NAVARRA Infanta doña was born before 19 Jan 1225 and died on 11 Aug 1283 in Château de Hédé, Ille-et-Vilaine, France.)