Robert married Margaret De Percy about 1339 in Of Castle, Prudhoe, Northumberland, England. Margaret (daughter of Henry De Percy, [BARON PERCY] and Idonea De Clifford) was born about 1318 in Of, Alnwick, Northumberland, England; was christened in Of, Alnwick, Northumberland, England; died on 3 Sep 1376 in Gyng, New Buttsbury, Essex, England; was buried in Church Of Friars, Chelmsford, Essex, England. [Group Sheet] [Family Chart]