Ancestry of Richard Plantagenet & Cecily de Neville @ chart 1779, 1780, St. Hermenegilde the Martyr, no parents, no title
The cited information was published by published by author, 1978 (Ref: chart 1779, 1780, St. Hermenegilde the Martyr, no parents, no title) The author/originator was Ernst-Friedrich Kraentzler.