Leonardo Pisano Bigollo

          Leonardo was born 1170 in Italy thought to be born in the city of Pisa. He had died in 1250, which would make him about 80 years old when he passed. Leonardo was Italian, and known for the Fibonacci numbers. The Fibonacci numbers are a series of numbers in which each each number is the sum of the two preceding numbers. How he got the name Fibonacci is because his nick name was of course Fibonacci.
          During the 12th century Leonardo under took travels on the Mediterranean. Leonardo gathered   most of his education in the North Africa where his father,  Guglielmo, held a diplomatic post.
Since Bigollo lived before there was printing, his books were hand written, so the only way you could have a personal copy of it, you would have to have another copy hand written copy made for you. 
          A third degree equation  x^3+ 2x^2+ 10x= 20 which Leonardo solved by a trial and error method known as approximation; his answer was: 1^022^i7^7t 42^III 33^IV 4^V 40^VI(1+22/60+7/3,600+42/216,000 .  .  .)

          You would also know him for the Fibiaoncci numbers, which are a series of numbers in which each number is the sum of the two preceding numbers.

These are my sources:
                                      http://www.britannica.com/biography/Leonardo-Pisano
                                    http://www-groups.dcs.st-and.ac.uk/~history/Biographies/Fibonacci.html
                                     http://famous-mathematicians.org/leonardo-pisano-bigollo/