|SOME NOTES ON MEDIEVAL ENGLISH GENEALOGY|
Volume 2, page 62:
JOHN (BEAUMONT), LORD BEAUMONT, [d.1460] s. and h., aged four years at the death of his father.
John's father died in June 1413 [Complete Peerage, vol.2, p.61]. The date of John's birth (as "domini de beaumont") is given as 16 August 1410 ("in crastino assumptionis beate virginis") in the Chronicle of John Somer [Camden 5th ser. vol.10, p.278 (1997)].
[From Douglas Richardson, November 2001]