List of rulers of Brittany
House of Plantagenet
Eleanor, Fair Maid of Brittany, eldest daughter of Geoffrey and Constance and full elder sister of Arthur, also unmarried, was prevented from succession for her imprisonment in England which lasted till her death in 1241, thus was only a titular duchess until 1214 when King John of England ceased to support her claim.

List of rulers of Brittany

Section Title: House of Plantagenet
Table Section Text: Eleanor, Fair Maid of Brittany, eldest daughter of Geoffrey and Constance and full elder sister of Arthur, also unmarried, was prevented from succession for her imprisonment in England which lasted till her death in 1241, thus was only a titular duchess until 1214 when King John of England ceased to support her claim.

Name	Portrait	Birth	Marriages	Death

Arthur I (Arzhur Iañ) 1196–1203 with Constance (1196-1201)	-	29 March 1187 Nantes only son of Geoffrey II and Constance	never married	3 April 1203 Rouen aged 16

Sentence(s)

Arthur I (29 March 1187 – 1203) was Duke of Brittany between 1196 and 1203.

final_sentence: Arthur I (29 March 1187 – 1203) was Duke of Brittany between 1196 and 1203.