[S65] Sewell, Robert James. Sewell: A History of the Sewell Family from the Earliest Times, (unknown: manuscript, March 2008).
[S60] Stuart, Roderick W. Royalty for Commoners, The Complete Known Lineage of John of Gaunt, Son of Edward III, King of England, and Queen Philippa Fourth Edition, (Baltimore, Maryland: Genealogical Publishing Company, 2002).