A manuscript which narrates the descents of the founders of Lanthony Abbey records that “Walterus”, son of “Gilbertus de Lacy”, married “Margeriam filiam Matildis de S. Walerico, quondam uxoris Willielmi de Brewes”. This wording suggests that Margery may have been her mother’s daughter by an earlier marriage, not the daughter of William de Briouse, although no other primary source has yet been identified which suggests that Maud married twice. Nevertheless, the Annals of Worcester record that King John exiled “Walterum de Lacy” in 1211 because he would not repudiate “uxorem suam, filiam W. de Breaus”. Her birth date range is estimated based firstly on her oldest son having had three children before he died in 1230, and her husband’s birth estimated to [1172]. If the range is correct, it is likely that Margery was one of her parents’s older children. A charter of King Edward II dated 26 Jan 1326 confirmed donations to Lanthony Abbey, among which a donation by “Walterus de Lacy filius Hugonis de Lacy” for the soul of “dominæ Margeriæ uxoris meæ”. King John granted land "in foresta nostra de Acornebur" to "Margaret de Lascy" to build a religious house, for the souls of "W. de Breusa patris sui, Matillid matris sue et W. fratris sui", dated 10 Oct 1216. "Walterus de Lacy" confirmed the donation by "Margeria uxor mea" to Acornbury priory, Herefordshire by charter dated to [1220/25], witnessed by “domino Willielmo de Lascy, domino Simone de Clifford, priore de Careswell, Egidio de Clifford…”. An undated charter of Henry III King of England confirmed a donation by ”Walterus de Lacy” to the Hospital of Ludlow, Shropshire, for the souls of “Margeriæ uxoris meæ…Gilberti de Lacy filii mei”. A charter dated 10 Oct 1241 ordered her dower to be assigned to "Margery who was the wife of Walter de Lacy". 1
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25 Jun 1241, Marlborough
The king has given respite to Margaret de Lacy, until Michaelmas in the twenty-fifth year, from the £12 which she owes him for certain chattels formerly of Walter de Lacy, formerly her husband, purchased from the king...
Calendar of Fine Rolls, 25 Hen. III, 490
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4 May 1242, Marwell
Mandate to W. archbishop of York, and William de Cantilupo to assign out of the lands in the king's hands with the heirs of Walter de Lacy, to Margery late his wife, reasonable dower, to the value of a third part of the lands whereof the said heirs are vouched to warranty in the king's court by charters of the said Walter against the said Margery when suing her dower of the said lands.
Calendar of Patent Rolls, vol. 3, p. 287
Also called Margaret DE BRIOUSE.