Ancestry of Richard Plantagenet & Cecily de Neville @ chart 1792, Rayner Lodbrok, K of Denmark & Sweden, s of Sigurd Ring, no mother
The cited information was published by published by author, 1978 (Ref: chart 1792, Rayner Lodbrok, K of Denmark & Sweden, s of Sigurd Ring, no mother) The author/originator was Ernst-Friedrich Kraentzler.