Qu24 Margaret de Quincy

     Margaret de Quincy (Qu24), Countess of Lincoln, was the daughter of Roger de Quincy (Qu25) and Helen (Alianora) of Galloway (1205? - 1245+)
    Born: about 1218
    Married: William de Ferrers, 5th Earl of Derby  (Fe24) 
    Died: 1281 (or 84)
    and had issue:
    (Fe23-7) William de Ferrers 
    (Fe23) Joan (Margaret) de Ferrers 
    Fe23-9 Robert de Ferrers 
    (Fe23-10) Matilda (of Bere) de Ferrers
    Fe23-11) Agnes (de) Ferrers 
     
    Source:

    http://freepages.genealogy.rootsweb.com/~jamesdow/s092/f502189.htm