Another name for Eleanor was Eleanor Mautravers.
Source: Wikipedia - John FitzAlan, 1st Baron Arundel
Eleanor married John FitzAlan 1st Baron Arundel and Lord Maltravers, son of Sir Richard "Copped Hat" FitzAlan 10th Earl of Arundel and Warenne and Eleanor of Lancaster, on 17 Feb 1358. (John FitzAlan 1st Baron Arundel and Lord Maltravers was born about 1348 in Etchingham, Sussex, England and died on 16 Dec 1379.)
1 Weis, Frederick Lewis and Walter Lee Sheppard, Jr; William R. Beall and Kaleen E. Beall, eds, Ancestral Roots of Certain American Colonists Who Came to America before 1700 (8th ed. Baltimore: Genealogical Publishing Company, 2008.), Line 59-34.
Wikipedia.org, John FitzAlan, 1st Baron Arundel.