Sir John de Grey, of Rotherfield, d. 17 Oct 1311, MP 1297. [Magna Charta Sureties]
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SIR JOHN DE GREY, son and heir, was summoned 26 January 1296/7 to a Council, and was summoned for Military Service from 30 March 1298 to 27 September 1299 (k). He was an executor of Edmund, Earl of Cornwall; was present at the Siege of Carlaverock. He married Margaret, 4th and youngest daughter of William DE ODDINGESELES by Ela, daughter of Walter FitzRobert, of Woodham Walter, Essex, and sister and coh. of Edmund DE ODDINGESELES, of Solihull and Maxstokc, co. Warwick. He died 17 October 1311. His widow had assignment of dower 20 January 1311/2, and licence to marry whom she would 10 June 1312. She appears to have married, 2ndly, in or before 1319, Robert DE MOREBY, of Moreby, co. York. [Complete Peerage VI:145, (transcribed by Dave Utzinger)]
(k) Subsequent writs addressed during his lifetime to John de Grey refer to John de Grey of Wilton.
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John de Grey, then twenty-four years of age, who, soon after doing his homage, had livery of his inheritance, and in the 25th Edward I [1297], had summons to the parliament then held at Westminster, as a baron. This nobleman appears to have taken part in the Scottish wars of Edward I. His lordship m. Margaret, dau. and co-heiress of William de Odingsells, of Maxtock, co. Warwick, and dying 5th Edward II [1312], was s. by his son, John de Grey, 2nd baron. [Sir Bernard Burke, Dormant, Abeyant, Forfeited and Extinct Peerages, Burke's Peerage, Ltd., London, England, 1883, p. 247, Grey, Barons Grey, of Rotherfield, co. Oxford]