Gilbert married Joan De Willoughby, [COUNTESS OF ANG about 1331 in Of Castle, Prudhoe, Northumberland, England. Joan (daughter of Robert Willoughby and Margaret Deincourt) was born about 1314 in Of Willoughby, D'Eresby, Lincolnshire, England; died on 16 Jul 1350; was buried in Newminster Abbey, , Northumberland, England. [Group Sheet] [Family Chart]