University of Hull Royal Database (England), Author Address: @ Isabel de Say, The Complete Peerage vol.X, Appendix J, p.113.
Has her as the wife OR the mother of William FitzAlan. Hull
names her as the daughter Helias de Say, the same as his
supposed mother.

The cited information was published by University of Hull, Hull, UK HU6 7RX, 1994, 1995, 1996 (Ref: Isabel de Say, The Complete Peerage vol.X, Appendix J, p.113.
Has her as the wife OR the mother of William FitzAlan. Hull
names her as the daughter Helias de Say, the same as his
supposed mother.) The author/originator was Brian Tompsett, Dept of Computer Science.

• Source Notes

  Usually reliable but sometimes includes hypothetical lines,
  mythological figures, etc.

• References (2)
  • Parent Source: University of Hull Royal Database (England), Author Address:
  • Individual: Isabel de Say