Marmaduke married Lucy de Brus Abt 1242. Lucy (daughter of Sir Peter II de Brus and Hawise de Lancaster) was born 1216; died Aft 1282. [Group Sheet]
Marmaduke married Isabel de Ros 1273. Isabel (daughter of Sir William de Ros of Ingmanthorpe and Eustache FitzRalph) was born Abt 1268; died 1309; was buried , Guisborough Priory, North Riding Yorkshire, England. [Group Sheet]
Lucy married Sir Robert de Lumley Bef 1314. Sir (son of Sir Robert de Lumley and Mary FitzMarmaduke) was born Abt 1290; died Bef 20 Jul 1325. [Group Sheet]
Sir married Margaret de Holand Abt 1352. Margaret (daughter of Sir Robert de Holand and Élizabeth de Hainaut) was born Abt 1336; died Aft 1365. [Group Sheet]