Robert Willoughby, 4th Baron Willoughby English soldier (1349–1396) Parents John Willoughby, 3rd Lord Willoughby Cecily Willoughby, Lady Willoughby Children Margaret de Willoughby Sir Thomas de Willoughby William Willoughby, 5th Baron Willoughby de Eresby Partners Alice de Skipwith Margery la Zouche Elizabeth Willoughby, Baroness Willoughby