Margaret de Briene

• Daughter of Sir Guy de Brienne, KG, Lord Bryan and Joan de Carew

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Royal Ancestry by Douglas Richardson Vol. II. page 327:

HUGH DE COURTENAY, Knt., 3rd Lord Courtenasy, son and heir. He married (1st) MARGARET DE BRYAN, they had no issue.

References

1. The complete peerage of England, Scotland, Ireland, Great Britain, and the United Kingdom : extant, extinct, or dormant. by Cokayne, George E. Vol 2, page 361-2. < Archive.Org > “BRYAN or BRIENE.” We know, however, that Guy de B. had other children, (i) Sir William de B., his 2nd s. d. s.p. 22 Sep. 1395, and was hur. at Seal, Kent. M.I. He left a widow Joan. (2) Philip, his 3rd s., d. s.p. before 14 Feb. 1388, the abovementioned Philippe and Elizabeth being found heirs to both their uncles. (3) Margaret was in 1361 wife of Hugh de Courtenay, grandson of the Earl of Devon {C/ose Roll, 35 Edw. Ill, m. 31 d), which Hugh d. s.p. 20 Feb. 1373/4. There was at least one other child. See ante, p. 201, note " b.
2. Beltz, George. Memorials of the Most Noble Order of the Garter (William Pickering, London, 1841) Page 54
3. https://www.wikitree.com/wiki/Brian-9