Margery la Zouche; m. by 29 March 1372, as his 2nd wife, 4th Lord (Baron) Willoughby de Eresby, and d. 18 Oct 1391. [Burke's Peerage, p. 3102]
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He [Robert de Willoughby] married, 2ndly, before 29 March 1372, Margrery, daughter of William (LA ZOUCHE), 2nd LORD ZOUCHE (of Haryngworth), by Elizabeth, daughter of William (DE ROS), 2nd LORD ROS (of Helmsley). She died 18 October 1391 and was buried at Spilsby. M.I. [Complete Peerage XII/2:660-1, (transcribed by Dave Utzinger)]