Claim: Gregor Clegane has a younger brother.

Sandor Clegane , nicknamed The Hound , is a fictional character in the A Song of Ice and Fire series of fantasy novels by American author George R. R. Martin , and its television adaptation Game of Thrones .   Introduced in 1996 's A Game of Thrones , Sandor is the younger brother of Ser Gregor Clegane , from the fictional kingdom of Westeros . He subsequently appeared in Martin 's A Clash of Kings -LRB- 1998 -RRB- , A Storm of Swords -LRB- 2000 -RRB- and A Feast for Crows -LRB- 2005 -RRB- .   Sandor Clegane is portrayed by Rory McCann in the HBO television adaptation .