Burke's Peerage & Baronetage
Robert de Sutton, of Worksop; b 1240; married Johanna, who had the lands of Ekering and Allerton in dower c1274, and died 1273/4 possessed of the Manors of Theydon and Montem, Essex and those of Aston and Byfeld, Northants.
The cited information was sourced from Book, edition 106th of published in 1999 edited by Charles Mosley (Ref: Page: 883)