a short summary from Wikipedia:

Henry III

Reign: 19 October 1216 – 16 November 1272

Coronation: 28 October 1216, Gloucester

17 May 1220, Westminster Abbey

Predecessor: John

Successor: Edward I

Regent William Marshal, 1st Earl of Pembroke (1216–1219)

Hubert de Burgh, 1st Earl of Kent (1219–1227)

Consort Eleanor of Provence

Issue:

Edward I of England

Margaret, Queen of Scots

Beatrice, Countess of Richmond

Edmund, 1st Earl of Leicester and Lancaster

Katherine of England

House: House of Plantagenet

Father: John, King of England

Mother: Isabella, Countess of Angoulême

Born: 1 October 1207

Winchester Castle, Hampshire

Died: 16 November 1272 (aged 65)

Westminster, London

Burial: Westminster Abbey, London

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Wikipedia links:

Afrikaans, العربية, Bosanski, Česky, Dansk, Deutsch, Ελληνικά, English, Español, Eesti, Euskara, Français, עברית, Hrvatski, Magyar, Íslenska, Italiano, 日本语, 한국어, Latviešu, Македонски, Bahasa Melayu, Nederlands, ‪Norsk (bokmål)‬, Polski, Português, Română, Русский, Slovenčina, Slovenščina, Српски / Srpski, Svenska, 中文

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other links:

http://www.britroyals.com/kings.asp?id=henry3

http://www.englishmonarchs.co.uk/plantagenet_4.htm

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=1954

http://genealogics.org/getperson.php?personID=I00000808&tree=LEO

http://www.geneall.net/U/per_page.php?id=218

http://histfam.familysearch.org/getperson.php?personID=I1301&tree=EuropeRoyalNobleHous

http://histfam.familysearch.org/getperson.php?personID=I93&tree=Nixon

http://histfam.familysearch.org/getperson.php?personID=I197565&tree=Welsh (which gives his birth year as 1206)

http://www.mathematical.com/englandhenry3king1206.html

http://www.nndb.com/people/711/000093432/

http://www.royalist.info/execute/biog?person=102

http://thepeerage.com/p10193.htm#i101923

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Citations / Sources :

[S494] #1 The Plantagenet Ancestry (1928), Turton, W. H. [William Harry], (London: Phillimore & Co., Ltd., 1928), FHL microfilm 87,859., p. 4, 120, 224.

[S1196] #552 Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten. Neue Folge (1978), Schwennicke, Detlev, (Marburg: Verlag von J. A. Stargardt, c1978-1995 (v. 1-16) -- Frankfurt am Main: Vittorio Klostermann, c1998- Medieval Families bibliography #552.), FHL book Q 940 D5es new series., Band 2 Tafel 18, 90. Schwennicke's, Europäische Stammtafeln,

[S556] #1325 Ogle and Bothal; or, A history of the baronies of Ogle, Bothal, and Hepple, and of the families of Ogle and Bertram, Ogle, Henry A., (Newcastle-upon-Tyne, England : Reid, 1902), 929.242 Og5o., p. 298a.

[S1260] An Encyclopedia of World History; Ancient, Medieval, and Modern, Chronologically Arranged (1972), Langer, William L., (5th edition. Boston: Houghton Mifflin Company, 1972), p. 127, 211. Henry III reigned 1216-1272.

[S1375] The Thirteenth Century, 1216-1307 (1953), Powicke, Frederick Maurice, Sir, (The Oxford History of England, vol. 4. Oxford: Clarendon Press, 1953), FHL book 942 H2oh v. 4., p. 268.

[S37] Journal of British Studies, (The University of Chicago Press), FHL Book 942 H25j., "Edward III and His Family", vol. 26 no. 4 p. 398.

[S34] Medieval, royalty, nobility family group sheets (filmed 1996), Church of Jesus Christ of Latter-day Saints. Family History Department. Medieval Family History Unit, (Manuscript. Salt Lake City, Utah : Filmed by the Genealogical Society of Utah, 1996), FHL film 1553977-1553985..

[S1348] #2 Der Europäischen käyser- und königlichen Häuser historische und genealogische Erläuterung (1730-1731), Lohmeier, Georg von, und Johann Ludwig Levin Gebhardi, (3 volumes in 1. Luneburg: Sternischen Buchdruckerei, 1730-1731), FHL microfilm 1,051,694, items 4-6., vol. 1 p. 72.

[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. 2 p. 476, 522.

[S13] #236 Encyclopédie généalogique des maisons souveraines du monde (1959-1966), Sirjean, Gaston, (Paris: Gaston Sirjean, 1959-1966), FHL book 944 D5se., p. 62; pedigree folio 3.

[S70] Plantagenet Ancestry: A Study in Colonial and Medieval Families, Richardson, Douglas, (Genealogical Publishing Company, Inc., 1001 N. Calvert St., Baltimore, Md. 21202, copyright 2004), p. xxviii, p. 50 ATHOLL:8.

[S499] #87 Genealogical Tables of the Sovereigns of the World, from the Earliest to the Present Period: Exhibiting in Each Table Their Immediate Successors, Collateral Branches and the Duration of Their Respective Reigns..., Betham, William, (London: W. Bennett, 1795), FHL book Q 929.2 B465g; FHL microfilm 87055., table 255.

[S21] #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 it., vol. 3 p. 644.

[S32] #89 A Genealogical History of the Kings of England, and Monarchs of Great Britain, & C. From the Conquest, Anno 1066 to the Year, 1677, Sandford, Francis, (London: Thomas Newcomb, 1677), FHL microfilm 599,670 item 3., p. 87, 92-94.

[S19] #849 Burke's Guide to the Royal Family (1973), (London: Burke's Peerage, c1973), FHl book 942 D22bgr., p. 195.

[S3] Medieval Lands: A Prosopography of Medieval European Noble and Royal Families, Cawley, Charles, (http://fmg.ac/Projects/MedLands), England, Kings 1066-1603 [accessed 28 Jun 2006].

[S119] #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. 6 p. 597, vol. 17 p. 179-180, vol. 26 p. 12-31.

[S536] #11577 Ættartolurbækur Jóns Espólíns Sysslumanns (1980-), Espólín, Jón, (Reykjavík: Samskipti, 1980-), FHL book 949.12 D2e v. 6; FHL microfilms 73,257-73., p. 98-99.

[S556] #1325 Ogle and Bothal; or, A history of the baronies of Ogle, Bothal, and Hepple, and of the families of Ogle and Bertram, Ogle, Henry A., (Newcastle-upon-Tyne, England : Reid, 1902), 929.242 Og5o., Pedigree XIV.

[S1199] #18 Stammtafeln zur Geschichte der europäischen Staaten (1953-1978), Isenburg, Wilhelm Karl , Prinz von and Frank Baron von Freytag-Loringhoven, (5 volumes. Marburg: J.A. Stargardt, 1953-1978), FHL book 940 D5f; FHL microfilms 251,160 items 1-3., vol. 2 table 15, 47, 60.

[S28] #150 [1879-1967] A Genealogical and Heraldic Dictionary of the Peerage and Baronetage, Together with Memoirs of the Privy Councillors and Knights (1879-1967), Burke, Sir John Bernard, (London: Harrison, 1879-1967), FHL book 942 D22bup., 1967 ed. p. lxii.

[S624] #2634 The Tauntons of Oxford (1902), Taunton, William Garnett, (London: Elliot Stock, 1902), FHL book 929.242 T193t; FHL microfilm 599,452 item., p. 20.

[S1440] #125 The Royal Daughters of England and Their Representatives (1910-1911), Lane, Henry Murray, (2 voulmes. London: Constable and Co., 1910-1911), FHL microfilm 88,003., vol. 1 p. 60-62, 120-129, 172-210, table 2 pt 1.

[S1196] #552 Europaische Stammtafeln: Stammtafeln zur Geschichte der europaischen Staaten. Neue Folge (1978), Schwennicke, Detlev, (Marburg: Verlag von J. A. Stargardt, c1978-1995 (v. 1-16) -- Frankfurt am Main: Vittorio Klostermann, c1998- Medieval Families bibliography #552.), FHL book Q 940 D5es new series., vol. 2 table 2.

[S35] Handbook of British Chronology (1986), Fryde, E. B., editor, (Royal Historical Society guides and handbooks, no. 2. London: Offices of the Royal Historical Society, 1986), FHL book 942 C4rg no. 2., p. 37.

[S1204] 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, (1st edition. Baltimore, Genealogical Publishing Co, 1996), FHL book 973 D2fp., p. 225.

[S18] #374 The Lineage and Ancestry of H. R. H. Prince Charles, Prince of Wales (1977), Paget, Gerald, (2 volumes. Baltimore: Geneal. Pub., 1977), FHL book Q 942 D22pg., vol. 1 p. 17.

[S19] #849 Burke's Guide to the Royal Family (1973), (London: Burke's Peerage, c1973), FHl book 942 D22bgr., p. 196.

[S1939] Plantagenet Ancestry, 2011 ed., Richardson, Douglas, (Kimball G. Everingham, editor, 2nd edition, 2011.), vol. 1 p. 42.

[S8] Les Capétiens, 987-1328 (2000), Van Kerrebrouck, Patrick, (Villeneuve-d'Ascq [France]: P. Van Kerrebrouck, 2000), FHL book 929.244 C171v., p. 226.

[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. 448.

[S70] Plantagenet Ancestry: A Study in Colonial and Medieval Families, Richardson, Douglas, (Genealogical Publishing Company, Inc., 1001 N. Calvert St., Baltimore, Md. 21202, copyright 2004), p. xxviii.

[S18] #374 The Lineage and Ancestry of H. R. H. Prince Charles, Prince of Wales (1977), Paget, Gerald, (2 volumes. Baltimore: Geneal. Pub., 1977), FHL book Q 942 D22pg., vol. 1 p. 18.