She was the daughter of John de Segrave, 4th Baron of Segrave and Margaret Marshall Plantagenet, Duchess of Norfolk.
She married John Mowbray, 4th Lord Mowbray (son of John de Mowbray, 3rd Lord Mowbray and Lady Joan Plantagenet, circa 1349).
She died before 1368, according to most sources. Her death date is variously reported as 1367, 1375, 1398, and 1399 as well, including the specific date 3/24/1399.
John de Segrave, n. 1314, Seagrave, Barrow upon Soar, Leicestershire,Inglaterra f. 20 Mar 1352, Chacombe Priory, Northamptonshire,Inglaterra (Edad 38 años)
Madre
Margaret Marshall Plantagenet, n. 1320, Grey Friar's, London, Greater London,Inglaterra f. 24 Mar 1399, Carthusian Church, Grey Friars, London,Inglaterra (Edad 79 años)