XII/1:763-4, in Complete Peerage of England Scotland Ireland Great Britain and the United Kingdom, by G. E Cokayne, Sutton Publishing Ltd, 2000.
"He [Roger de Toeni] married Ida, daughter of BALDWIN III, COUNT OF HAINAULT, by Yolande, daughter of Gerard, COUNT OF GUELDERS. With her he had in marriage from Henry 120 librates of land out of the royal demesne at East Bergholt, Suffolk."