Margaret was the sister of Griffith de Warren, of Ightfield, in Salop, a younger branch of the Earls of Warrenne who descened from Hamlet Plantagenet, natural son of Henry II.
~A Genealogical and Heraldic History of the Commoners of Great Britain, p. 654 804
Margaretta married Griffth Hull, son of William Hull and Unknown 804.,807 (Griffth Hull was born in Hull, Shropshire, England.)