Joan of Brittany, Baroness of Drayton

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Jeanne de Montfort (1341 – November 8, 1402), also known as Jeanne de Bretagne, was the sister of John IV, Duke of Brittany.

Her parents were John of Montfort and Joanna of Flanders.

She grew up in England together with her brother, John IV, Duke of Brittany, and was brought up with King Edward III's children. When her brother returned to Brittany to take the dukedom, she remained in England. At the age of 39 she married Ralph Basset, 3rd Baron Basset of Drayton.

In 1398 she was appointed as a Constable of Richmond Castle by the will of King Richard II.

Jeanne died on November 8, 1402. She was buried at Lavendon Abbey, Buckinghamshire.

• Baroness of Drayton (since 1380)
• Constable of Richmond Castle (since 1398)

• Michael Jones, Ducal Brittany, 1364–1399: relations with England and France during the reign of Duke John IV, Oxford University Press, 1970