Isabel Marshal was a medieval English countess and a member of the Marshal Family. She was the wife of both Gilbert de Clare, 4th Earl of Hertford and 5th Earl of Gloucester and Richard, 1st Earl of Cornwall. With the former, she was a great-grandmother of King Robert the Bruce of Scotland.
- Citizenship
- Kingdom of England
- Born
- October 9, 1200, 1200
- Died
- January 17, 1240, 1240
