Royalty for Commoners: The Complete Known Lineage of John  of Gaunt, Son of Edward III, King of England, and Queen Philippa

The cited information was published by 3rd ed., 1998, Genealogical Publishing Co., Inc.,  Baltimore, MD The author/originator was Roderick W. Stuart.
Royalty for Commoners. 

• References (24)
  • Family: Siegfried Count of Luxembourg & Hedwig von Nordgau
  • Family: Hugh I Seigneur de Abbeville de Montreuil & Gisele Princess of France
  • Family: Egbert Count of Holland Archbishop
  • Individual: Beatrice of St. Pol
  • Individual: Hugh II Count of Ponthieu Ponthieu
  • Individual: Roger Count of St Pol
  • Individual: Hadwide (Hedwig) of Houchin
  • Individual: Manasses de St Pol
  • Individual: Hugh II Count of St Pol
  • Individual: NN
  • Individual: Hugh I Seigneur de Abbeville de Montreuil
  • Individual: Enguerrand I (Engelram) Count of Ponthieu
  • Individual: Adele Countess of Ghent
  • Individual: Luitgarde of Luxembourg
  • Individual: Rosella De St. Pol
  • Individual: Hugues III "Candavere" St. Pol
  • Individual: Helissende , Cts of St. Pol de Ponthieu
  • Individual: Margaret Comyn
  • Individual: Dirk III Count of Holland
  • Individual: Anselme de ST. POL
  • Individual: Arnulf Count of Holland
  • Marriage / Union: Siegfried Count of Luxembourg & Hedwig von Nordgau
  • Marriage / Union: Hugh I Seigneur de Abbeville de Montreuil & Gisele Princess of France
  • Marriage / Union: Egbert Count of Holland Archbishop