According to Burke's Dormant, Abeyant, Forfeited and Extinct Peerages, she married Robert de Ferrers, 2nd Earl of Derby and thus became Countess of Derby. She was the mother of William de Ferrers, 3rd Earl of Derby and William De Ferrers, Lord of Eggington and a daughter, Petronella.{Burke's Dormant, Abeyant, Forfeited and Extinct Peerages}
^Cokayne, George Edward, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct, or Dormant (London: St. Catherine Press, 1910.), 4:311
^Keats-Rohan, K.S.B., Domesday People: A Prosopography of Persons Occurring in English Documents, 1066-1166 (Woodbridge: The Boydell Press, 1999.), pp. 361, 494
^Sheppard, Walter Lee, F.A.S.G., "Royal Bye-Blows: The Illegitimate Children of the English Kings," New England Historical and Genealogical Register 119(2):95