She is married to Laurence 3rd Baron Hastings.
They got married after May 29, 1328 at 1st husband.Sources 1, 2
Child(ren):
He [Laurence de Hastinges] m. shortly after 29 May 1328, at Hereford,Agnes, 3rd daughter of Roger de Mortimer, 1st Earl of March, by Joan,daughter and heir of Piers de Geneville. . . . His widow m. 2ndly,between 30 Nov 1348 and 12 Nov 1351, John de Hakelut. She survived him,d. 25 July 1368, and was buried in the church of the Minoresses withoutAldgate. [Complete Peerage X:390-1]