Isabel (died in or after 1230), daughter of Adam de Brus, Lord of Skelton, Cleveland (through her he had the Manor of Levinton), for which he [Henry Percy] and his heirs were to repair to Skelton Castle every Christmas Day and lead the lady of the castle from her chamber to the chapel to mass and thence to her chamber again, there to take meat with her, and then withdraw). [Burke's Peerage]