a short summary from Wikipedia;

John of Gaunt (Ghent), 1st Duke of Lancaster, KG

Successor: Henry IV Bolingbroke, King of England (2nd Duke of Lancaster and of Aquitaine)

Spouse:

Blanche of Lancaster

m. 1359; dec. 1369

Infanta Constance of Castile

m. 1371; dec. 1394

Katherine Swynford

m. 1396; wid. 1399

Issue:

Philippa, Queen of Portugal

Elizabeth, Duchess of Exeter

Henry IV Bolingbroke, King of England

Catherine, Queen of Castile

John Beaufort, 1st Earl of Somerset

Cardinal Henry Beaufort

Thomas Beaufort, Duke of Exeter

Joan Beaufort, Countess of Westmorland

House House of Plantagenet (by birth)

House of Lancaster (founder)

Father Edward III of Windsor, King of England

Mother Philippa of Hainault

Born 6 March 1340(1340-03-06)

Ghent, Belgium

Died 3 February 1399 (aged 58)

Leicester Castle, Leicestershire

Burial St Paul's Cathedral, City of London

Wikipedia links:

Afrikaans, Alemannisch, Bosanski, Català, Česky, Cymraeg, Deutsch, Ελληνικά, English, Español, Euskara, Français, Suomi, Galego, עברית, Magyar, Bahasa Indonesia, Italiano, Latviešu, Mirandés, Nederlands, Norsk (bokmål)‬, Polski, Português, Русский, Slovenčina, Svenska, ไทย, Українська, 中文

other links

http://www.britannia.com/bios/royals/jgdklanc.html

http://www.findagrave.com/cgi-bin/fg.cgi?page=gr&GRid=28331470

http://www.geneall.net/U/per_page.php?id=942

http://genealogics.org/getperson.php?personID=I00000812&tree=LEO

http://www.mathematical.com/gauntjohn1340.htm (which gives his baptism date as his birth date)

http://www.nndb.com/people/826/000094544/

http://www.royalist.info/execute/biog?person=6

http://www.thepeerage.com/p10188.htm#i101878

http://www.tudorplace.com.ar/PLANTAGENET2.htm

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Titles: Also, King of Leon (Spain), Duke of Lancaster & Aquitaine, Earl of Derby, Lincoln & Leicester & Seneschal of England. And English soldier & statesman. He owned the Savoy Palace on the banks of the Thames.

Sources: The Church of Jesus Christ of Latter-Day Saints. The book, 'Kings & Queens of Great Britain. Funk & Wagnalls New Encyclopedia. The book, 'Queens of England'. The book, 'The Oxford History of Medieval Europe'. The book, 'The House of Tudor'. The book, 'Kings & Queens of Europe'. The book, 'The Book of the Medieval Knight'. The book, 'The Oxford History of the British Monarchy'. The book, 'The Year of the Three Kings, 1483'. The book, 'Now I Remember'. The book, 'The Princes of Wales'. The book, 'They Came with the Conqueror'.