Ancestry of Richard Plantagenet & Cecily de Neville @ chart 1060, d. of (grandfather) John FitzAlan de Arundel & Isabella de Mortimer
The cited information was published by published by author, 1978 (Ref: chart 1060, d. of (grandfather) John FitzAlan de Arundel & Isabella de Mortimer) The author/originator was Ernst-Friedrich Kraentzler.