"Joan FitzAlan, Countess of Hereford, Countess of Essex and Countess of Northampton (1347 – 7 April 1419), was the wife of the 7th Earl of Hereford, 6th Earl of Essex and 2nd Earl of Northampton. She was the mother of Mary de Bohun, the first wife of Henry of Bolingbroke who later reigned as King Henry IV, and Eleanor de Bohun, Duchess of Gloucester. She was the maternal grandmother of King Henry V."

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Links:

http://en.wikipedia.org/wiki/Joan_Fitzalan,_Countess_of_Hereford

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=82243123

http://www.geneall.net/U/per_page.php?id=1075

http://histfam.familysearch.org/getperson.php?personID=I257&tree=Nixon

http://thepeerage.com/p10169.htm#i101689

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Citations:

1. [S11] Alison Weir, Britain's Royal Family: A Complete Genealogy (London, U.K.: The Bodley Head, 1999), page 78. Hereinafter cited as Britain's Royal Family.

2. [S125] Richard Glanville-Brown, online <e-mail address>, Richard Glanville-Brown (RR 2, Milton, Ontario, Canada), downloaded 17 August 2005.

3. [S452] #21 The Complete Peerage of England, Scotland, Ireland, Great Britain and the United Kingdom, Extant, Extinct, or Dormant (1910), Cokayne, George Edward (main author) and Vicary Gibbs (added author), (New edition. 13 volumes in 14. London: St. Catherine Press,1910-), vol. 4 appndx. H chart I.

4. [S394] #230 [5th edition, 1999] The Magna Charta Sureties, 1215 (5th edition, 1999), Adams, Arthur, (5th edition. Baltimore: Genealogical Publishing, 1999), FHL book 973 D2aa 1999., p. 26 line 18:7.

5. [S347] Plantagenet Ancestry of Seventeenth-century Colonists: the Descent from the Later Plantagenet Kings of England, Henry III, Edward I, Edward II, and Edward III, of Emigrants from England and Wales to the North American Colonies Before 1701 (2nd ed., 1999), Faris, David, (2nd edition. Boston: New England Historic Genealogical Society, 1999), FHL book 973 D2fp., p. 35 BOHUN:10.