Britain's Royal Families: The Complete Genealogy, rev. ed. @ p 66, d of Robt de Beaumont, 3rd Earl of Beaumont (her brother
in this db), no mother. I have her as daughter of Robt de
Beaumont, 2nd Earl of Beaumont.

The cited information was published by Pimlico Random House, London, England, 1989, 1996 (Ref: p 66, d of Robt de Beaumont, 3rd Earl of Beaumont (her brother
in this db), no mother. I have her as daughter of Robt de
Beaumont, 2nd Earl of Beaumont.) 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: Hawise de Beaumont