|SOME NOTES ON MEDIEVAL ENGLISH GENEALOGY|
Volume 9, page 6:
He [John de Moels (d. 1310)] m., in or before 1302, Maud.(b)
Cal. Patent Rolls, 1301-7, p. 53. Her parentage has not been ascertained.
John P. Ravilious, in January 2002, pointed out that in 1311 John, Lord Grey of Wilton, (d. 1323) settled by fines lands on his younger son Roger, with successive remainders to Roger, son of John de Moels and John and Ralph, sons of Ralph Basset of Drayton [Complete Peerage, vol. 6, p. 153, note a]. Ralph Basset of Drayton had married a daughter of John, Lord Grey, so this evidence supports the statement of Dugdale [Baronage, p. 620] that John de Moels married a daughter of Lord Grey of Ruthin (which was held, with Wilton, by John de Grey).
The Roger de Moels mentioned in the fines was born "about 11 June 1295" [p. 6]. Note that neither his elder brother Nicholas (b. 1289), nor his younger brother John (presumably born in 1304, as he proved his age in 1325) are mentioned, which may imply that they were children of different marriages.
[This problem was also discussed by Douglas Richardson.]