Arthur I (Breton: Arzhur 1añ; French: Arthur 1er de Bretagne) (29 March 1187 – presumably 1203) was 4th Earl of Richmond and Duke of Brittany between...

Duke of Brittany and 3rd Earl of Richmond between 1181 and 1186, through his marriage to Constance, Duchess of Brittany. Geoffrey was the fourth of five...

1201) was Duchess of Brittany from 1166 to her death in 1201 and Countess of Richmond from 1171 to 1201. Constance was the daughter of Duke Conan IV by his...

Arthur II (25 July 1261 – 27 August 1312), of the House of Dreux, was Duke of Brittany from 1305 to his death. He was the first son of John II and Beatrice...

truth of the matter. William was in attendance with John in Normandy at the time of Arthur of Brittany's imprisonment and it was alleged that Arthur suffered...

half-brother was Arthur I, Duke of Brittany and her half-sisters were Eleanor, Fair Maid of Brittany and Matilda of Brittany, the children of Constance and...

Peter I (French: Pierre; c. 1187 – 26 May 1250), also known as Peter Mauclerc, was Duke of Brittany jure uxoris from 1213 to 1221, and regent of the duchy...

youngest son of Duke John IV of Brittany. Richard's older brothers, John V and Arthur III, both succeeded their father as duke, but upon Arthur's death in...

(1418–1457), was Duke of Brittany, Count of Montfort and titular earl of Richmond, from 1450 to his death. He was son of Duke John VI and Joan of France, and...

French: Jean le Sage), was Duke of Brittany and Count of Montfort from 1399 to his death. His rule coincided with the height of the Hundred Years' War between...