谁嫁给了Gaston VII, Viscount of Béarn？

Gaston VII de Montcada (Latin: Guasto de Biarde; 1225 – 26 April 1290), called Froissard, was the twentieth Viscount of Béarn from 1229. He was the son and heir of Guillermo II de Montcada of the House of Montcada and of Garsenda, daughter of Alfonso II of Provence and Garsenda of Forcalquier. He was succeeded by Roger-Bernard III of Foix.

Martha of Marsan (1228–1283) (also known as Mathe or Amata) was a ruling Viscountess of Marsan. She was suo jure Viscountess of Marsan, which she inherited from her father.

Beatrice of Savoy (c. 1237 – 21 April 1310) ruled as Lady of Faucigny from 1268, having succeeded her mother, Agnes of Faucigny. She was the only legitimate child of Peter II, Count of Savoy, but did not inherit the county, which passed instead to her uncle. Beatrice was also Dauphine of Viennois and Viscountess of Béarn by her two marriages.