|SOME NOTES ON MEDIEVAL ENGLISH GENEALOGY|
Volume 5, chart between pages 432 and 433:
Joan [dau of] Henry FitzHugh, Lord FitzHugh ... d. 11 Jan 1424/5 ... [by] Elizabeth, da. and h. of Sir Robert Grey ... 1st wife [of] Robert, Lord Willoughby: 24+ in 1409: d. 25 July 1452: will 6 June 1452, to be bur. in Mettingham Coll. Ch.
In the account of Willoughby (Complete Peerage, volume 12, part 2, p.665) no mention is made of this Joan.
[This discrepancy was pointed out independently by Tim Powys-Lybbe in March 2002, Dave Utzinger later the same month and Douglas Richardson in June 2002.]