Gregor Clegane is a fictional dog.
Conan Stevens . He is best known for his role as Gregor Clegane in the first season of HBO series Game of Thrones . Gregor Clegane . Ser Gregor Clegane is a huge knight and the elder brother of Sandor Clegane . He is able to wield a two-handed sword one handed . A knight is a person granted an honorary title of knighthood by a monarch or other political leader for service to the monarch or country , especially in a military capacity .