From the book Reifsnyder-Gillam Ancestry, edited by Thomas Allen Glenn (Philadelphia, 1902), provided by books.google.com, p. 50:
"The Earl of Arundel had issue by his first wife Elizabeth:...
4. Alianora, who had Royal License 28 Oct. 1371, to marry Robert de Ufford, son of William Earl of Suffolk. [Notes from the Patent Rolls Inq. etc.]; but is said in 'Williamson's Evidences' to have died unmarried, p. 30.] [Hist. Cheshire, Ormerod, p. 38.]..."