The following additional information, the results of Jack Day's research, is provided, but does not appear to provide evidence that would change the biographical information provided by Douglas Richardson in his 2013 Royal Ancestry. ~ Noland-165 08:57, 20 December 2019 (UTC)
Jack Day asks if Roger is another name for Thomas, noting that Robertson's 1893 work Stemmata say that Sir Thomas Lewknor, b. 1362 of Thomas and Joan, MP1404, d. 1471 is called Sir Roger in Sussex Arch Soc iii p. 89. m. Elizabeth Carew.
Jack continues the discussion of this information about Thomas/Roger, saying: "A very significant problem with this is that Roger died in 1400 not 1471. A second significant problem is Thomas being born in 1362 and dying in 1471 at the age of 109. It is possible that '1471' was simply an error of the typesetter for '1401', since such a long life would be otherwise remarked."
Jack also notes that some genealogies erroneously show
Roger married instead to Margaret, daughter of John Carew of Molesford.
Thomas married to Elizabeth daughter of Nicholas Carew of Beddington - she was in fact his mother.
Thomas married to Catherine - she was in fact his daughter-in-law.
"To add to the confusion," says Jack, "a collection of historical Staffordshire stories reports that Roger Lewknor, who resided at Bradhurst, Co. Sussex, married Margaret, daughter of Sir John Carew, of Molesford, Co. Bucks, Knight, and died 1401."
↑ Marriage in 1391, Mallerforde, Buckinghamshire is in datafields as of 19 Dec. 2019 but without support in the text for this profile. A comment citing this page says "Sir Roger Lewkenor - b: abt 1369 in Horsted Keynes, Sussex, d: abt 1391 in Mallerforde, Buckinghamshire" married Elizabeth Carew (the "also married Mercy Hayme" in the comment refers to Nicholas Carew, not Roger Lewknor).
↑ Documented by "Staffordshire", but with a caveat. The author of "Staffordshire" writes, "I suppose" Eleanor Harcourt to have been the daughter of the same Sir Roger.
↑ No documentation has been found for Walter, and no explanation for why he was said to be born in Goring rather than Horsted Keynes.
↑Stemmata Robertson et Durdin, compiled by Herbert Robertson, (London, 1893), InternetArchive, Creative Commons License: Attribution-Noncommercial-Share Alike 2.5 UK: Scotland. page 102, Table 30
↑ The History of Parliament Online has a biography for a Robert Lewknor "of Heythrop, Oxon. and Pulborough," Sussex, who was MP for Sussex in 1404, and which notes that he "did not come from that important branch of the Lewknor family with large estates in Sussex and Middlesex to which belonged Roger Lewknor, the shire knight of 1335-51, and Sir Thomas Lewknor, the MP of 1422 and 1425, although he was distantly related to them both." ~ Biography of Robert Lewknor by L.S. Woodger, posted by History of Parliament Online (accessed 20 December 2019).
Douglas Richardson, Magna Carta Ancestry, 2nd edition 2011, Vol. II, p. 509; Vol. III, p. 17-18; Vol. III, p. 181; Vol IV page 1
Douglas Richardson, Royal Ancestry, Vol. IV, p. 154-155. (With Dallyngridge), and Vol IV, page 570 - 571
See also the following online databases, which are not considered reliable by the Magna Carta Project (see the project's Reliable Sources page):
Jorge H. Castelli. Tudor Place, Carew. Accessed July 4, 2015. Note -- while Tudor Place does not document every fact, it cites original documents when possible and appears more reliable than many sites. Jack Day, July 4, 2015). Note2: There were no sources apparent for Roger Lewknor, wife Elizabeth Carew, nor her parents (as of 19 Dec. 2019). ~ Noland-165.