, dau. of William Keith 9th Earl Marischal and sole heir of her brothers the Earl Marischal and Field Marshall Keith. This lady was sole heir-general of the illustrious houses of Fleeming, Earl of Wigton; Keith, Earl Marischal; and Drummond, Earl of Perth; Lady Willoughby de Eresby being heir-general, and the Earl of Perth being heir-male, of the younger line of the Earl of Melfort.