Premise: The Duchies of Gwynedd are the largest feudal estates within the fictional Kingdom of Gwynedd in the Deryni novels of Katherine Kurtz . Ser Gregor Clegane , nicknamed The Mountain , 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 , Gregor is the older brother of Sandor Clegane , from the fictional kingdom of Westeros .
Hypothesis: Gregor Clegane is from the fictional kingdom of Essos.
Label: NEUTRAL