Guess What? I found out that Basurto is Spanish Basque. I am including a link here for you to check out. The Basque people come from the Pyrenees mountains between France and Spain. They have their own language (origin unknown) and great food. I hope this helps. Being such a small amount of Basurto's I am sure we are related and will bump into each other's family tree somewhere. I'll let you know if I find anymore information.

http://students.washington.edu/buber/Basque/Surname/B/basurt...