Ancestry of Richard Plantagenet & Cecily de Neville @ chart 1173, Arnoul Kastvogt von Schonis, Reichsvogt von Zurich
The cited information was published by published by author, 1978 (Ref: chart 1173, Arnoul Kastvogt von Schonis, Reichsvogt von Zurich) The author/originator was Ernst-Friedrich Kraentzler.