William of Ockham (c. 1285-1347)

William of Ockham was an English Franciscan friar and scholastic philosopher, from Ockham in Surrey. As a Franciscan, William was devoted to a life of extreme poverty.

One important contribution that he made to modern science and modern intellectual culture was through the principle of parsimony in explanation and theory building that came to be known as Ockham's razor.

From Wikipedia 

See also:
Internet Encyclopedia of Philosophy 
New Advent 

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