Constance was suo jure Viscountess of Marsan as well as titular Countess of Bigorre, daughter of Gaston VII, Viscount of Béarn and his first wife Martha of Marsan. Constance inherited all of her titles from her mother and contended to inherit her father's Viscounty of Béarn. She was married three times during her lifetime, marrying into the royal families of Aragon, Castile and England.
- Occupation
- aristocrat
- Citizenship
- France
- Born
- 1245
- Died
- April 26, 1310, 1299, 1310
