This is just a suggestion, intended to elicit discussion and perhaps proof, one way or the other (true / false). Duncan II, King of Scots, d. 1094 William FitzDuncan = Alice de Rumilly Amabel FitzDuncan = Reynold/ Reginald de Lucy Richard de Lucy = Ada de Morville Alice de Lucy = Alan de Multon Sir Thomas de Multon (assumed the name "de Lucy") = Isabel de Bolteby Alice de Lucy = Sir Guischard de Charron Joan de Charron = (2) Sir Richard de Willoughby Sir Edmund de Willoughby = Alice de Somerville Edmund Willoughby = Isabel Annesley Sir Hugh Willoughby = (1) Isabel Foljambe Margaret Willoughby = William Belgrave John Belgrave = Katherine Glenn/ Glene Richard Belgrave = Margery Cotton Dorothy Belgrave = (2) William Saunders Mary Saunders = John Sharpe Bridget Sharpe = Leonard Chester John Chester = Dorothy Hooker Leonard Chester = Mary Watts or Wade First generations, down to Richard Lucy (m. Ada de Morville) shown in this pdf from Cambridge University Press: https://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=21&ved=0ahUKEwiW_Z_xotfKAhWI8CYKHYOUBJg4FBAWCBswAA&url=http%3A%2F%2Fwww.cambridge.org%2Fus%2Fdownload_file%2F225222%2F&usg=AFQjCNFMcvBviMKO5H9lOX0BcSPahDNrEg&bvm=bv.113034660,d.eWE&cad=rja The four generations from Reynold de Lucy to Thomas de Lucy (m. Isabel Bolteby) are shown in G. E. Cokayne, _Complete Peerage_, sub "Lucy." The marriage of Alice de Lucy to Sir Guischard de Charron is shown in this pedigree chart in the Northumberland county set (vol. 9, p. 251): https://archive.org/stream/historyofnorthum09nort#page/250/mode/2up The descent from Alice de Lucy (m. Charron) down to Sir Hugh Willoughby (m. Isabel Foljambe) is then shown in Leo's genealogics.org, apparently based on research by Robert O'Connor: http://www.genealogics.org/getperson.php?personID=I00262812&tree=LEO See also Thoroton, which shows the descent from Sir Richard Willoughby's second wife Joan Charron: https://books.google.ca/books?id=xD4uAAAAMAAJ&pg=PA209&dq=thoroton+willoughby+pole&hl=en&sa=X&ved=0ahUKEwi8s8qQoNfKAhXD4iYKHe9jBD4Q6AEIGzAA#v=onepage&q=thoroton%20willoughby%20pole&f=false Simon Payling's _Political society in Lancastrian England: The Greater Gentry of Nottinghamshire_ also implies this link for the Willoughbys through Charron: https://books.google.com/books?id=VlBnAAAAMAAJ&q=%22had+purchased,+to+Edmund,+his+only+son+by+his+second+wife,+Joan+Charron%22&dq=%22had+purchased,+to+Edmund,+his+only+son+by+his+second+wife,+Joan+Charron%22&hl=en&sa=X&ved=0ahUKEwj9rZyL7PnTAhXCQiYKHUaCBXIQ6AEIIzAA The parents of Margaret Willoughby (m. Belgrave) are given as Hugh Willoughby and Isabel Foljambe in the Nottinghamshire Visitation: https://books.google.com/books?id=zS4EAAAAIAAJ&pg=PA146&dq=annesley+willoughby]&hl=en&sa=X&ved=0ahUKEwiCq5eoitfKAhUCPCYKHRKLBXUQ6AEIIzAB#v=onepage&q=annesley%20willoughby]&f=false Also a few s.g.m. postings, such as: "Some sources show Sir Edmund de Willoughby as being married to a daughter of Sir R. Pole. This is incorrect. Sir Edmund de Willoughby was the only child of Sir Richard III de Willoughby (one time Chief Justice of the King's Bench) and his second wife Joan Charron (daughter of Sir Guichard III de Charron and Alice Lucy), widow of Sir Bertram I de Monboucher. Joan was married to Sir Richard de Willoughby by 11 November 1333 and Edmund was born shortly after this. Edmund was married to Alice de Somerville of Cossington co. Leicester daughter of James de Somerville." https://groups.google.com/forum/?hl=en#!searchin/soc.genealogy.medieval/alice$20lucy$20charron/soc.genealogy.medieval/z64wgKUg6Sw/HpYqniyIdM8J Doug had noted that if Guischard Charron's wife was in fact Alice de Lucy, there would be a Scottish royal line. There's also this snippet from a document showing that Sir Thomas de Lucy had the wardship of Guischard de Charron the younger (and then presumably married him to his own daughter): https://www.google.com/search?tbm=bks&hl=en&q=%22Receipt+in+French%2C+from+sir+Gwychard+de+Charron+to+sir+Thomas+de+Lucy%2C+of+part+payment+of+the+sum+in+which+sir+%22