 As arranged by his father, he married the daughter and heiress of Thomas de Middleton, whose wardship and marriage the former had acquired from King John in 1204.Richard de Grenville (son) (fl.1295), who married Jane Trewent, daughter and heiress of William Trewent of Blisland, Cornwall, in the hundred of Trigg Minor, situated 5 miles north-east of Bodmin.