Henry IV of England

there are several "disagreements / conflicts " regarding his birth date and date and location of his first marriages

as you can see Wikipedia has his birth date as 15 of April 1367

other references have 3rd or 4th of April as well as birth year of 1366

first marriages (from wikipedia)

" The date and venue of Henry's first marriage, to Mary de Bohun, are uncertain, but her marriage licence, purchased by Henry's father John of Gaunt in June 1380 is preserved at the National Archives. The accepted date of the ceremony is 5 February 1381, at Mary's family home of Rochford Hall, Essex.[2] Alternately, the near-contemporary chronicler Jean Froissart reports a rumour that Mary's sister Eleanor de Bohun kidnapped Mary from Pleshey Castle and held her at Arundel Castle, where she was kept as a novice nun; Eleanor's intention was to control Mary's half of the Bohun inheritance (or to allow her husband, Thomas of Woodstock, 1st Duke of Gloucester, to control it).[24][25] There Mary was persuaded to marry Henry. They had six children"

other references give 27 July 1380 and also marriage year as 1381

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"Henry IV (15 April 1367– 20 March 1413) was King of England and Lord of Ireland (1399–1413). He was the tenth King of England of the House of Plantagenet and also asserted his grandfather's claim to the title King of France. He was born at Bolingbroke Castle in Lincolnshire, hence his other name, Henry (of) Bolingbroke /ˈbɒlɪŋbrʊk/. His father, John of Gaunt, was the third son of Edward III, and enjoyed a position of considerable influence during much of the reign of Henry's cousin Richard II, whom Henry eventually deposed. Henry's mother was Blanche, heiress to the considerable Lancaster estates, thus he became the first King of England from the Lancaster branch of the Plantagenets."

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Wikipedia links:

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other links:

http://www.britroyals.com/kings.asp?id=henry4

http://www.englishmonarchs.co.uk/plantagenet_9.htm

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=1959

http://www.geneall.net/U/per_page.php?id=1184

http://histfam.familysearch.org/getperson.php?personID=I1119&tree=E...

http://histfam.familysearch.org/getperson.php?personID=I146&tree=Nixon

http://www.luminarium.org/encyclopedia/henry4.htm

http://www.nndb.com/people/702/000093423/

http://www.royalist.info/execute/biog?person=30

http://www.thepeerage.com/p10187.htm#i101863

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Citations / Sources:

[S4] C.F.J. Hankinson, editor, DeBretts Peerage, Baronetage, Knightage and Companionage, 147th year (London, U.K.: Odhams Press, 1949), page 20 . Hereinafter cited as DeBretts Peerage, 1949.

[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 III, page 258. Hereinafter cited as The Complete Peerage.

[S6] Cokayne, and others, The Complete Peerage, volume II, page 70.

[S7] #44 Histoire de la maison royale de France anciens barons du royaume: et des grands officiers de la couronne (1726, reprint 1967-1968), Saint-Marie, Anselme de, (3rd edition. 9 volumes. 1726. Reprint Paris: Editions du Palais Royal, 1967-1968), FHL book 944 D5a; FHL microfilms 532,231-532,239., vol. 1 p. 286, 453, 592.

[S11] Alison Weir, Britain's Royal Families: The Complete Genealogy (London, U.K.: The Bodley Head, 1999), pages 122,127. Hereinafter cited as Britain's Royal Families.

[S13] #379 [7th edition, 1992] Ancestral Roots of Certain American Colonists, Who Came to America Before 1700: the Lineage of Alfred the Great, Charlemagne, Malcolm of Scotland, Robert the Strong, and Some of Their Descendants (7th edition, 1992), Weis, Frederick Lewis, (7th edition. Baltimore: Genealogical Publishing Company, c1992), FHL book 974 D2w 1992., p. 4 line 1A:32.

[S14] #236 Encyclopédie généalogique des maisons souveraines du monde (1959-1966), Sirjean, Gaston, (Paris: Gaston Sirjean, 1959-1966), FHL book 944 D5se., vol. 1 pt. 2 p. 64.

[S15] Les Valois (1990), Van Kerrebrouck, Patrick, (Villeneuve d'Ascq [France]: P. Van Kerrebrouck, 1990), FHL book 929.244 V247k., p. 118.

[S16] #894 Cahiers de Saint-Louis (1976), Louis IX, Roi de France, (Angers: J. Saillot, 1976), FHL book 944 D22ds., vol. 1 p. 4, 18, vol. 2 p. 83, vol. 11 p. 833, vol. 30 p. 12, 39.

[S18] Matthew H.C.G., editor, Dictionary of National Biography on CD-ROM (Oxford, U.K.: Oxford University Press, 1995). Hereinafter cited as Dictionary of National Biography.

[S23] #849 Burke's Guide to the Royal Family (1973), (London: Burke's Peerage, c1973), FHl book 942 D22bgr., p. 199, 202.

[S37] #93 [Book version] The Dictionary of National Biography: from the Earliest Times to 1900 (1885-1900, reprint 1993), Stephen, Leslie, (22 volumes. 1885-1900. Reprint, Oxford, England: Oxford University Press, 1993), FHL book 920.042 D561n., vol. 9 p. 289-290 vol. 22 p. 43-55 vol. 26 p. 31-42, 56-59, 69-94.