Sources:
Genealogicel History of the Kings and Queens of England. By: Francic Sandford. editor: Samuel Stebbing, ob. cit. page 99-100 lists only Richard, walter and Isabell.
The House of Cornwall, by: Cecil George Savile Foljamb, Earl of Liverpool, and Compton Read. P. 31-43.
Complete Peerage rev. ed. London 1910-1959Vol. 11, page 431, note G.
On son Richard see "The Barons of Burford" in " The Genealogist, 1879, Vol. 3, Pages 225-230.
Dictionary of National Biography, Vol.48, Page 174.
Known children from this union.
Richard de Cornwall
Walter de Cornwall
Lawrence de Cornwall b: ABT. 1241
Isabella de Cornwall b: ABT. 1258
Joan de Cornwall b: ABT. 1260
Philip de Cornwallys b: ABT. 1262