Zij is getrouwd met Richard "The Red" Óg de Burgh 2nd Earl of Ulster.
Zij zijn getrouwd voor 27 februari 1280/1281.Bronnen 5, 6
Kind(eren):
He [Richard de Burgh] married, before 27 February 1280/1, Margaret[possible daughter of Arnoul III, Count of Guisnes, by Alice, daughter ofEnguerrand III, Lord of Coucy], who died in 1304. Having been present, 11May 1326, in the Irish Parliament held at Kilkenny, he went to themonastery at Athassel, where he died 29 July 1326 and was buried shortlybefore 29 August. [Complete Peerage XII/2: 173-7, XIV:619, (transcribedby Dave Utzinger)]
14=Margaret (no last name), 15=Margery (no last name)