Son of Walter Seys, "Rhosier 'Hen,' who m. a daughter of Sir Walter Devereux, and his [Walter's] grandson, Roger Vaughan, who m. Gwladys , daughter of Dafydd Gam (q.v.)"[14]
"Roger Vaughan was the son of Walter Sais ap Roger Vychan of Llechry"[7]
Roger Hen ap "Gwalter Sais ap Rosser Vychan ap Rosser Vawr ap Ieuan ap Howel ap Seissyllt ap Morreiddig Warwyn"[6]
Children
Sir Roger Vaughan (d. 1415),[5][15] m Gwladus, daughter of Sir David Gam[7]
If I'm reading the latest Geni entries correctly (1 June 2023), then the Ann Devereaux who married Roger Vaughan is the daughter of [[Devereux-779|Walter Devereaux (d c1383)] and his wife Maud. And Walter is the son of Walter/William Devereaux (c1315-1377) and Ann Barre. (The Bartrum chart Drymbenog 2 is for Roger's family, not hers, and gives no indication of which Sir Walter Devereaux Ann was the daughter of.) ~ Noland-165
Leads
History of Parliament Online: John Merbury (d. 1438), married "(2) by 1417, Agnes (1371-3 Feb. 1436), da. and h. of Thomas Crophill, wid. of Sir Walter Devereux* of Weobley and John Parr of Kirkby Kendal, Westmld.,1 1da." (see page for footnotes)
GenForum post, "Devereux of Weobley detailed information" by Richard Williams, July 01, 2001
Dictionary of Welsh Biography search for Devereux: 16 results
William Herbert, earl of Pembroke, "m. Anne Devereux , sister of Walter, lord Ferrers of Chartley" in 1459.
Calendar of Inquisitions Post Mortem, Vol 10, 26-34 Edward III: 1352-1361, p. 433, Record no. 531.
"Walter Deveroys of Bodenham, aged 50 years and more,..." gave proof of age for Edmund son and heir of Reynold le Fitz Herberd in 33 Edw. III (1359). This Walter, born in or before 1309, does not have a WikiTree profile that I could find. The profile for the Walter who died in 1383 identifies him as "uncle Walter... (himself aged "50 years or more")" on 11 May 1359.
Sources
↑ General agreement among various sources - aside from the one "William" Devereux.
↑ Based on #Wikipedia articles and the biography posted by the History of Parliament Online for Walter m Agnes (which does not mention Ann)
↑ The Wikipedia article on Walter Devereux (died c. 1383) does list his daughter as Ann, wife of "Roger Vaughan of Lechryd.[45]" "Roger Vaughan of Lechryd" is a clickable link to the Wikipedia article for Roger Vaughan of Bredwardine (both articles accessed 1 June 2023), which seems to be for his son:
According to later pedigrees, an English soldier named Walter Sais, settled near Tretower, moved to Bredwardine after marrying Sir Walter Bredwardine's daughter[1] named Florence.[4]
An elder son, Roger Hen (the elder)[3] (also known as Rhoger Fawr, Roger the Great),[4] married a daughter of Sir Walter Devereux of Weobley[1]
Their son, Roger Vaughan, is the subject of this article.[1] ... married Gwladys ferch Dafydd Gam, daughter of Dafydd Gam...[1]
↑ "DBE 544 WikiData - Possible Mother on WikiData" suggests this profile for Anne Devereaux-61 as possible mother of Roger Vaughan-61: wikidata Q99080647. Since the profiles are already attached as mother/son, the suggestion was marked false (1 May 2021).
↑ 16.016.116.2 from Devereux-143, apparently from Geni (no sources that I could find)... at the time. As of 1 June 2023, the Geni entry for Blanche redirects to "Lady Anne Devereux" which cites Bartrum (Drymbenog 2) and WikiTree (Devereaux-61): "Updated from WikiTree Genealogy via parent Walter Devereux by SmartCopy: Sep 4 2015, 15:10:17 UTC.
Lewis Dwnn,Heraldic Visitations Of Wales And Part Of The Marches Between The Years 1586 And 1613, Vol.1
The Bartrum Project, digitization of "Welsh Genealogies AD 300- 1500" by Peter C. Bartrum (mirrored from the defunct Cadair site by Geni: Bartrum Genealogical Project - free login required to access the charts). See additional information about Cadair in G2G. The following chart is in WikiTree, and cited as source for Genealoligics' entry for Walter Devereaux, cited by his wikidata entry - Wikidata: Item Q99080653 - which says he is "also known as "Sir William Devereux" (accessed 1 June 2023).
Ann Devereux, "Our Royal, Titled, Noble, and Commoner Ancestors and Cousins" (website, compiled by Mr. Marlyn Lewis, Portland, OR; accessed June 5, 2015) - note: no citations.
Leads
Some generational issues in the following:
Jones, Theophilus; A History of the County of Brecknock: : in two volumes : containing the chorography, general history, religion, laws, customs, manners, language and system of agriculture used in that county. pp. 500-5; Publisher: Brecknock. Printed and sold by Wm. & Geo. North ... for the author ; and sold by J. Booth ... London., 1805-1809
Electronic search for Devereaux in Douglas Richardson's Magna Carta AncestryGoogle book
Devereaux - not found
Walter - found Walter Devereux, Knt., son and heir of William Devereux, Knt.; married Agnes Crophill before Nov. 1382; died 1401.
"The inscription on the tomb of Sir Walter’s da. Elizabeth (wife of John Milbourne, esquire) at Burghill, Herefs., states that her father interfectus fuit bello apud Pilleth, but his post mortem (C137/34/9), claims that he died on 25 June."
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Ann... Turner-Thomas database has her as daughter of Walter & Ann (Barre) Devereux... WikiTree has William as Ann Barre's husband (see note on Devereux-43 though).
update: see "Disputed Family" section. I don't think this profile and Devereux-143 are meant to be for the same person, despite having the same maiden name & being married to the same man.
This link to Prof Evans' papers has Devereux mention (m Roger Hen) : http://www.aias.us/index.php?goto=showPageByTitle&pageTitle=Some_family_history