Robert married Joan Beaufort before 30 Sep 1394 in Chateau de Beaufort, Haute-Loire, France. Joan (daughter of John "of Gaunt" Plantagenet, 1st. Duke of Lancaster and Catherine Roet) was born about 1379 in Chateau de Beaufort, Haute-Loire, France; died on 13 Nov 1440 in Howden, Yorkshire, England; was buried in Lincoln Cathedral, Lincolnshire, England. [Group Sheet]

1. Lady Mary De Ferrers was born before 1394 in Oversley, Warwickshire, England; died on 25 Jan 1458.