Sir Thomas Malory (c. 1430-c. 1471), was the author or compiler of Le Morte D'Arthur. From his own words he is known to have been a knight, and his description of himself as "a servant of Jesu both day and night" has led to the inference that he was also a priest. On the authority of John Leland the antiquary he is said to have been Welsh; another view is that he originated from Warwickshire. The surname appears in various spellings, including those of Maillorie and Maleore. Little else is known of Malory's life, but he is believed to have been a Lancastrian during the Wars of the Roses.
Malory is believed to have obtained the material for his work from a French source. In the preface to the first edition of the Le Morte D'Arthur, William Caxton speaks of the work as printed by himself "after a copy unto me delivered, which copy Sir Thomas Malory did take out of certain books of French, and reduced it into English." Malory himself tells us that he finished the book in the ninth year of King Edward IV of England (about 1470). Le Morte D'Arthur brought together the various strands of the legend in a prose romance which is reckoned the best of its kind.
Link (has different year of birth): http://www.luminarium.org/medlit/malory.htm