"Margaret his wife, according to official records and the direct evidences of the Cheshire Domesday Roll as cited [Chesh. Domesday, No. 54], was daughter of Griffin, or Gruffydd ap Madog, the last Prince of Powys-Vadog, Lord of Bromfield and the Castle of Dinas Bran, near Llangollen, and a warlike ally of the Earls of Chester. His father, Madog, was the founder of Valle Crucis Abbey, and his wife, Emma, daughter of Henry Lord Audley, the founder of Hilton Abbey. For other particulars of her princely ancestors, Yorke's Royal Tribes, and Dugdale's Baronetage, may be severally consulted [Royal Tribes, pp. 59 to 63, and Baronetage, i, 747.] Three of her five brothers died issueless, two being said to have perished, when infants, in the Dee above Aldford. Their alleged murders were bitterly revenged by the descendant of the third, Owen Glendower."
