I haven't seen yet that she was married to William Rolleston, but I only did a quick search at this time. Also this references lists Eleanor Wingfield the wife of William Hoo as the dau. of John Wingfield, so maybe there is confusion between the two Eleanor's.
Sussex Archaeological Collections Relating to the History and ..., Volume 8
Sir William Hoo, Knt.; ob. 22 Nov. 1410, aet. 75; bu. at Mulbarton, co. Norfolk. = Alice, da. and coheiress of Thomas de St. Omer, and on the side of her mother, Petronilla, d. & coheiress of Nicholas, Lord de Malmaynes; will dated 1375; bu. at Mulbarton; 1st wife. ; ch: Sir Thomas (m. Eleanor Felton & Elizabeth Echingham), John (living 1428; ob. S.P.), Margaret (m. Thomas St. Clere) Hoo ; = Eleanor, d. of Sir John Wingfield. 2d wife. ; ch: Thomas (m. Dorothy Norwood) Hoo