Isabel Marshal

Isabel Marshal
Countess of Hertford; Countess of Cornwall
Born	9 October 1200 Pembroke Castle, Wales
Died	17 January 1240(1240-01-17) (aged 39) Berkhamsted Castle, Hertfordshire, England
Burial	Body: Beaulieu Abbey, Hampshire Heart: Tewkesbury Abbey, Glos.
Spouse	Gilbert de Clare, 4th Earl of Hertford (m. 1217–30; his death) Richard, 1st Earl of Cornwall (m. 1231–40, her death)
Issue	Agnes de Clare Amice de Redvers, Countess of Devon Richard de Clare, 6th Earl of Hertford Isabel de Brus, Lady of Annandale William de Clare Gilbert de Clare Henry of Almain
Father	William Marshal, 1st Earl of Pembroke
Mother	Isabel de Clare, 3rd Countess of Pembroke

Isabel Marshal (9 October 1200 – 17 January 1240) was a medieval English countess. She was the wife of both Gilbert de Clare, 4th Earl of Hertford and 5th Earl of Gloucester and Richard, 1st Earl of Cornwall (son of King John of England). With the former, she was a great grandmother of King Robert the Bruce of Scotland.