Maud de Montagu

Alice of Norfolk married, before 29 August 1338, William's uncle, Edward Montagu, 1st Baron Montagu (d. 14 July 1361), youngest son of William Montagu, 2nd Baron Montagu (d. 18 October 1319), by Elizabeth Montfort (d. August 1354), daughter of Sir Piers Montfort of Beaudesert, Warwickshire, by whom she had a son and four daughters:

3. Maud Montagu (d. before 5 October 1393), who was elected Abbess of Barking Abbey on 20 April 1377.

notes

From The National Archives - The Brotherton Inheritance

The Bigod lands and title were immediately earmarked for Thomas of Brotherton, a younger son of Edward I born in 1300. In 1310 Thomas's father granted to him the lands and in 1312 the title as well, but Thomas died in 1338 leaving only two daughters as his heirs, his son Edward having died without issue shortly before. The estate was then divided between his widow Mary (d. 1362), Edward's widow Beatrice (d. 1383), and the two daughters. [Edward had died and Beatrice was married to Thomas de Breouse by Sept. 1337: GEC ix. 599.] The younger, Alice, married Edward Montague (d. 1361) and had a son and four daughters of whom only two daughters survived their father: Maud entered Barking Abbey and Joan married William de Ufford, who succeeded his father as earl of Suffolk in 1369. Joan and all four of her sons died without surviving issue in 1375, and on William's death in 1382 her portion of the Brotherton inheritance passed to her aunt, Thomas of Brotherton's elder daughter Margaret.