Britain's Royal Families: The Complete Genealogy, rev. ed. @ p 71, a woman called Suzanne, or a sister of Wm de Warenne Earl
of Surrey (Surrey's sister undoubtedly bore the King a child,
but its identity is uncertain)

The cited information was published by Pimlico Random House, London, England, 1989, 1996 (Ref: p 71, a woman called Suzanne, or a sister of Wm de Warenne Earl
of Surrey (Surrey's sister undoubtedly bore the King a child,
but its identity is uncertain)) The author/originator was Alison Weir.

• Source Notes

  ABBR Britain's Royal Families

• References (2)
  • Parent Source: Britain's Royal Families: The Complete Genealogy, rev. ed.
  • Individual: Suzanne de Warenne