Be very careful:

Elizabeth de Beauchamp 1417-1480, daughter of Richard de Beauchamp, Earl of Warwick, 1382-1439 and Elizabeth Berkely m1. George Neville, son of Ralph Neville and Joan Beaufort; m2. Thomas Wake

Elizabeth de Beauchamp 1415-1448, daughter of Richard de Beauchamp, Earl of Worcester, 1397 – 1422 and Isabel de Spencer m. Edward Neville, son of Ralph Neville and Joan Beaufort

Isabel de Spencer, mother of Elizabeth de Beauchamp of Worcester m2. Richard de Beauchamp of Warwick 1382-1439.

(Janet Palo-Jackson 4 Jan 2010)

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"Elizabeth de Beauchamp (16 September 1415 Hanley Castle, Worcestershire, England – 18 June 1448) was the only child and heiress of Richard de Beauchamp, Baron Abergavenny and 1st Earl of Worcester, by Isabel, daughter of Thomas le Despencer, Earl of Gloucester by Constance of York, granddaughter of Edward III."

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Links:

http://en.wikipedia.org/wiki/Elizabeth_de_Beauchamp,_Lady_of_Aberga...

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=51808495

https://histfam.familysearch.org/getperson.php?personID=I11342&tree...

http://histfam.familysearch.org/getperson.php?personID=I6713&tree=N...

http://histfam.familysearch.org/getperson.php?personID=I1656&tree=P...

http://www.thepeerage.com/p10273.htm#i102724

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Citations / Sources:

[S2] Paget Heraldic Baronage, Paget, Gerald, (Manuscript, filmed by the Genealogical Society of Utah, 1957), chart no. 41 Beauchamp, Lord Bergavenny, FHL microfilm 170063 (Reliability: 3).

[S2] Paget Heraldic Baronage, Paget, Gerald, (Manuscript, filmed by the Genealogical Society of Utah, 1957), chart no. 410 Nevill, Lords Abergavenny, FHL microfilm 170066 2/3 (Reliability: 3).

[S2] Paget Heraldic Baronage, Paget, Gerald, (Manuscript, filmed by the Genealogical Society of Utah, 1957), chart no. 39 Beauchamp of Elmley, chart no. 41, Lord Bergavenny, FHL microfilm 170063 (Reliability: 3).

[S2] Paget Heraldic Baronage, Paget, Gerald, (Manuscript, filmed by the Genealogical Society of Utah, 1957), chart no. 182 Despenser, FHL microfilm 170064 (Reliability: 3).

[S5] #244 The History and Antiquities of the County of Northampton (1822-1841), Baker, George, (2 volumes. London: J. B. Nichols and Son, 1822-1841), FHL book Q 942.55 H2bal; FHL microfilm 962,237 items 1-2., vol. 2 p. 219.

[S6] G.E. Cokayne; with Vicary Gibbs, H.A. Doubleday, Geoffrey H. White, Duncan Warrand and Lord Howard de Walden, editors, The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct or Dormant, new ed., 13 volumes in 14 (1910-1959; reprint in 6 volumes, Gloucester, U.K.: Alan Sutton Publishing, 2000), volume I, pages 26-27, 29-30.

[S8] Charles Mosley, editor, Burke's Peerage and Baronetage, 106th edition, 2 volumes (Crans, Switzerland: Burke's Peerage (Genealogical Books) Ltd, 1999), volume 1, page 17. Hereinafter cited as Burke's Peerage and Baronetage, 106th edition.

[S11] Alison Weir, Britain's Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 108. Hereinafter cited as Britain's Royal Families.

[S17] #894 Cahiers de Saint-Louis (1976), Louis IX, Roi de France, (Angers: J. Saillot, 1976), FHL book 944 D22ds., vol. 2 p. 102.

[S29] #798 The Wallop Family and Their Ancestry, Watney, Vernon James, (4 volumes. Oxford: John Johnson, 1928), FHL book Q 929.242 W159w; FHL microfilm 1696491 items 6-9., vol. 1 p. 70, vol. 3 p. 584, 587.

[S30] #688 Collectanea topographica et genealogica (1834-1843), (8 volumes. London: J.B. Nichols, 1834-1843), FHL book 942 B2ct; FHL microfilms 496,953 item 3 and 496,955 item 2., vol. 1 p. 300, 406.

[S80] #389 Histories of Noble British Families: with Biographical Notices of the Most Distinguished Individual in Each, Illustrated by Their Armorial Bearings, Portraits, Monuments, Seals, Etc. (1846), Drummond, Henry, (2 volumes. London: W. Pickering, 1846), FHL microfilm 990,417 item 1., vol. 2 p. 9, 17.

"Elizabeth Beauchamp, only child of the Earl of Worcester, and heiress through her mother of the baronies of Le Despencer, and Beauchamp de Bergavenny."

[S143] #696 Visitations of the north, or, some early heraldic visitations of, and collections of pedigrees relating to, the north of England, Blair, Charles Henry Hunter, (Durham [England] : Andrews, 1912-1932. Part of the Publications of the Surtees Society.), 942 B4s., vol. 144 p. 30.

[S323] An historical and genealogical account of the noble family of Nevill, particularly of the house of Abergavenny, and also a history of the old land barony of Abergavenny : with some account of the illustrious family of the Beauchamps, and others, through w, Rowland, Daniel, (London : Bentley, 1830), 929.242 N416r., p. 104.

[S385] #773 The History and Antiquities of the County of Rutland: Compiled from the Works of the Most Approved Historians, National Records and Other Authentic Documents, Public and Private (1811), Blore, Thomas, (Stanford: R. Newcomb, [1811]), FHL book 942.545 H2b (British X Large Folio)., vol. 1 pt. 2 p. 19.