Ancestry of Richard Plantagenet & Cecily de Neville @ chart 1059, Margaret de Fiennes, d of Wm de Fiennes & Blanche de Brienne
The cited information was published by published by author, 1978 (Ref: chart 1059, Margaret de Fiennes, d of Wm de Fiennes & Blanche de Brienne) The author/originator was Ernst-Friedrich Kraentzler.