Europèaische Stammtafeln (Isenburg edition) @ Vol III chart 637, s of Hugh Montgomerie & Joscelina de Torfulus
The cited information was published by Verlag von J.A. Stargardt, Marburg, Germany, 1953, 1975 (Ref: Vol III chart 637, s of Hugh Montgomerie & Joscelina de Torfulus) The author/originator was Prince Wilhelm Karl von Isenburg.