Ancestry of Richard Plantagenet & Cecily de Neville @ Chart 1842, p 401, Arphaxad (ararpkha in Sumer, Agathadaemon in Greece), no mother
The cited information was published by published by author, 1978 (Ref: Chart 1842, p 401, Arphaxad (ararpkha in Sumer, Agathadaemon in Greece), no mother) The author/originator was Ernst-Friedrich Kraentzler.