Borzoi's are tall, thin dogs who decended in the lands of Russia. Because of its orgin, they have also been called Russian wolfhounds as a secondary name in America until 1936. Created by mixing Arabian greyhounds with other large and heavy coated russian breeds, the Borzoi was born in the 17th century. They are hounds with high speeds who were used to catch foxes, wolves and rabbits. Today they are still very popular hunting.
http://www.dogbreedinfo.com/borzoi.htm
http://www.akc.org/breeds/borzoi/