|Lists||Domesday Landholders, 1086|
|Charts||Ancestors of Wilford Ervie Billings|
- [S2072] K. S. B. Keats-Rohan, Domesday People: A Prosopography of Persons Occurring in English Documents 1066-1166 I. Domesday Book (Woodbridge, England: Boydell Press, 1999), 134, further cited as Keats-Rohan, Domesday People.
- [S2054] George Edward Cokayne, The Complete Peerage: Or a History of the House of Lords and All Its Members From the Earliest Times: Revised and Much Enlarged, 13 in 14 vols. (London, England: The St. Catherine Press, 1910-1940), 3:551n (Cromwell), further cited as CP.
- [S2054] CP, 3:551 (Cromwell).