Royal Descents of Famous People @ Has her mother of Margaret FitzAlan, her husband's
granddaughter by his 2nd wife!  Also, daughter of Edward le
Despenser, her nephew!

The cited information was published by 1995, 1996 (Ref: Has her mother of Margaret FitzAlan, her husband's
granddaughter by his 2nd wife!  Also, daughter of Edward le
Despenser, her nephew!) The author/originator was Mark Humphrys.

• Source Notes

  Based on Burke's Peerage of American Presidents, Burke's
  Dormant & Extinct Peerage: Ferrers, Neville, Clifford) &
  Burke's Peerage 1970. See notes section for Edward III.

• References (2)
  • Parent Source: Royal Descents of Famous People
  • Individual: Isabel le Despenser