Some corrections and additions to the Complete Peerage: Volume 9: Mortimer (PROPOSED CORRECTIONS)

MORTIMER or MORTEMER of Wigmore

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Volume 9, page 268:
HUGH DE MORTIMER, [son of Ralph de Mortimer, the Domesday tenant] s. and h. Hugh de Mortimer attested a charter by Gerold, Abbot of St. Lucien at Beauvais [1100-28], in the time of Stephen, Count of Aumâle.

Robert de Mortimer of Norfolk attested a charter of Henry de Beaumont, earl of Warwick, who died in 1119. If Robert was Hugh's younger brother, this suggests Hugh was born before 1100 [Ian Mortimer, The Medieval Mortimer Family: An outline lineage]. (See Mortimer of Attleborough.)

[Item last updated 22 June 2019.]

Volume 9, page 276:
He [Ralph de Mortimer (d. 1246)] m., in 1230, Gladys (Gladusa) Duy, or Dark-eyed, da. of Llewelyn AP JORWORTH, by his 2nd wife, Joan (illeg. da. of KING JOHN), and widow of Reynold DE BRAOSE (d. June 1228).(j)
Note j:
Ann. Mon. (Rolls Ser.), vol. iv, p. 421.

On the identity of Gladys's mother, see Abergavenny, vol. 1, p. 22.