Martha, Viscountess of Marsan Viscountess (1230–1270) Parents Boson de Matha Petronilla, Countess of Bigorre Children Margaret of Béarn Constance of Béarn Mathe de Montcade Guillelme de Montcada Siblings Petronille of Montfort Alice, Countess of Bigorre Partners Gaston VII, Viscount of Béarn