Theon Greyjoy 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. Theon is the youngest son and heir of Balon Greyjoy, taken as a ward by Lord Eddard Stark following Balon's failed rebellion. Theon's complex and troubled relationship with both his family and his captors is central to the character's arc throughout the novels and its television adaptation.
Introduced in 1996's A Game...